diff --git a/framework/yii/bootstrap/Button.php b/framework/yii/bootstrap/Button.php
new file mode 100644
index 0000000..be605b9
--- /dev/null
+++ b/framework/yii/bootstrap/Button.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\bootstrap;
+
+use yii\base\InvalidConfigException;
+use yii\helpers\Html;
+
+
+/**
+ * Button renders a bootstrap button.
+ *
+ * For example,
+ *
+ * ```php
+ * echo Button::widget(array(
+ *     'label' => 'Action',
+ *     'options' => array('class' => 'btn-large'),
+ * ));
+ * ```
+ * @see http://twitter.github.io/bootstrap/javascript.html#buttons
+ * @author Antonio Ramirez <amigo.cobos@gmail.com>
+ * @since 2.0
+ */
+class Button extends Widget
+{
+    /**
+     * @var string the tag to use to render the button
+     */
+    public $tagName = 'button';
+    /**
+     * @var string the button label
+     */
+    public $label;
+    /**
+     * @var boolean whether the label should be HTML-encoded.
+     */
+    public $encodeLabel = true;
+
+
+    /**
+     * Initializes the widget.
+     * If you override this method, make sure you call the parent implementation first.
+     * @throws InvalidConfigException
+     */
+    public function init()
+    {
+        if ($this->label === null) {
+            throw new InvalidConfigException("The 'label' option is required.");
+        }
+        parent::init();
+        $this->clientOptions = false;
+        $this->addCssClass($this->options, 'btn');
+        $this->label = $this->encodeLabel ? Html::encode($this->label) : $this->label;
+    }
+
+    /**
+     * Renders the widget.
+     */
+    public function run()
+    {
+        echo Html::tag($this->tagName, $this->label, $this->options) . "\n";
+        $this->registerPlugin('button');
+    }
+}
\ No newline at end of file
diff --git a/framework/yii/bootstrap/ButtonDropdown.php b/framework/yii/bootstrap/ButtonDropdown.php
new file mode 100644
index 0000000..65d0398
--- /dev/null
+++ b/framework/yii/bootstrap/ButtonDropdown.php
@@ -0,0 +1,168 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\bootstrap;
+
+use yii\base\InvalidConfigException;
+use yii\helpers\Html;
+
+
+/**
+ * ButtonDropdown renders a group or split button dropdown bootstrap component.
+ *
+ * For example,
+ *
+ * ```php
+ * // a button group using Dropdown widget
+ * echo ButtonDropdown::widget(array(
+ *     'label' => 'Action',
+ *     'items' => Dropdown::widget(array(
+ *         'clientOptions' => false,
+ *         'items' => array(
+ *             array(
+ *                 'label' => 'DropdownA',
+ *                 'url' => '/',
+ *             ),
+ *             array(
+ *                 'label' => 'DropdownB',
+ *                 'url' => '#',
+ *             ),
+ *         ),
+ *     )),
+ * ));
+ *
+ * // split button dropdown using `items` configuration
+ * echo ButtonDropdown::widget(array(
+ *     'label' => 'Action',
+ *     'split' => true,
+ *     'items' => array(
+ *         array(
+ *             'label' => 'DropdownA',
+ *             'url' => '/',
+ *         ),
+ *         array(
+ *             'label' => 'DropdownB',
+ *             'url' => '#',
+ *         ),
+ *      ),
+ * ));
+ * ```
+ * @see http://twitter.github.io/bootstrap/javascript.html#buttons
+ * @see http://twitter.github.io/bootstrap/components.html#buttonDropdowns
+ * @author Antonio Ramirez <amigo.cobos@gmail.com>
+ * @since 2.0
+ */
+class ButtonDropdown extends Widget
+{
+	/**
+	 * @var string the button label
+	 */
+	public $label;
+	/**
+	 * @var array the HTML attributes of the button.
+	 */
+	public $buttonOptions = array();
+	/**
+	 * @var array list of menu items in the dropdown. Each array element represents a single
+	 * menu with the following structure:
+	 *
+	 * - label: string, required, the label of the item link
+	 * - url: string, optional, the url of the item link. Defaults to "#".
+	 * - linkOptions: array, optional, the HTML attributes of the item link.
+	 * - options: array, optional, the HTML attributes of the item.
+	 * - items: array, optional, the dropdown items configuration array.
+	 *
+	 * @see https://github.com/twitter/bootstrap/issues/5050#issuecomment-11741727
+	 * @see [[Dropdown]]
+	 */
+	public $items = array();
+	/**
+	 * @var boolean whether to display a group or split styled button group.
+	 */
+	public $split = false;
+	/**
+	 * @var boolean whether the labels for dropdown items should be HTML-encoded.
+	 */
+	public $encodeLabels = true;
+
+
+	/**
+	 * Initializes the widget.
+	 * If you override this method, make sure you call the parent implementation first.
+	 * @throws InvalidConfigException
+	 */
+	public function init()
+	{
+		if ($this->label === null) {
+			throw new InvalidConfigException("The 'label' option is required.");
+		}
+		parent::init();
+		$this->addCssClass($this->options, 'btn-group');
+	}
+
+	/**
+	 * Renders the widget.
+	 */
+	public function run()
+	{
+		echo Html::beginTag('div', $this->options) . "\n";
+		echo $this->renderButton() . "\n";
+		echo $this->renderItems() . "\n";
+		echo Html::endTag('div') . "\n";
+		$this->registerPlugin('button');
+	}
+
+	/**
+	 * Generates the button dropdown.
+	 * @return string the rendering result.
+	 */
+	protected function renderButton()
+	{
+		$this->addCssClass($this->buttonOptions, 'btn');
+		$splitButton = '';
+		if ($this->split) {
+			$tag = 'button';
+			$options = $this->buttonOptions;
+			$this->buttonOptions['data-toggle'] = 'dropdown';
+			$this->addCssClass($this->buttonOptions, 'dropdown-toggle');
+			$splitButton = Button::widget(array(
+					'label' => '<span class="caret"></span>',
+					'encodeLabel' => false,
+					'options' => $this->buttonOptions,
+				)
+			);
+		} else {
+			$tag = 'a';
+			$this->label .= ' <span class="caret"></span>';
+			$options = $this->buttonOptions;
+			if (!isset($options['href'])) {
+				$options['href'] = '#';
+			}
+			$this->addCssClass($options, 'dropdown-toggle');
+			$options['data-toggle'] = 'dropdown';
+		}
+		return Button::widget(array(
+			'tagName' => $tag,
+			'label' => $this->label,
+			'options' => $options,
+			'encodeLabel' => false,
+		)) . "\n" . $splitButton;
+	}
+
+	/**
+	 * Generates the dropdown menu as specified on [[items]].
+	 * @return string the rendering result.
+	 */
+	protected function renderItems()
+	{
+		if (is_string($this->items)) {
+			return $this->items;
+		}
+		$config = array('items' => $this->items, 'clientOptions' => false);
+		return Dropdown::widget($config);
+	}
+}
\ No newline at end of file
diff --git a/framework/yii/bootstrap/ButtonGroup.php b/framework/yii/bootstrap/ButtonGroup.php
new file mode 100644
index 0000000..fa903a1
--- /dev/null
+++ b/framework/yii/bootstrap/ButtonGroup.php
@@ -0,0 +1,129 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\bootstrap;
+
+use yii\helpers\base\ArrayHelper;
+use yii\helpers\Html;
+
+
+/**
+ * ButtonGroup renders a button group bootstrap component.
+ *
+ * For example,
+ *
+ * ```php
+ * // a button group with items configuration
+ * echo ButtonGroup::::widget(array(
+ *     'items' => array(
+ *         array('label'=>'A'),
+ *         array('label'=>'B'),
+ *     )
+ * ));
+ *
+ * // button group with an item as a string
+ * echo ButtonGroup::::widget(array(
+ *     'items' => array(
+ *         Button::widget(array('label'=>'A')),
+ *         array('label'=>'B'),
+ *     )
+ * ));
+ *
+ * // button group with body content as string
+ * ButtonGroup::beging();
+ * Button::widget(array('label'=>'A')), // you can also use plain string
+ * ButtonGroup::end();
+ * ```
+ * @see http://twitter.github.io/bootstrap/javascript.html#buttons
+ * @see http://twitter.github.io/bootstrap/components.html#buttonGroups
+ * @author Antonio Ramirez <amigo.cobos@gmail.com>
+ * @since 2.0
+ */
+class ButtonGroup extends Widget
+{
+	/**
+	 * @var array list of buttons. Each array element represents a single
+	 * menu with the following structure:
+	 *
+	 * - label: string, required, the button label.
+	 * - options: array, optional, the HTML attributes of the button.
+	 *
+	 * Optionally, you can also set each item as a string, or even the [[items]] attribute.
+	 */
+	public $items = array();
+	/**
+	 * @var boolean whether the labels for dropdown items should be HTML-encoded.
+	 */
+	public $encodeLabels = true;
+
+
+	/**
+	 * Initializes the widget.
+	 * If you override this method, make sure you call the parent implementation first.
+	 */
+	public function init()
+	{
+		parent::init();
+		$this->clientOptions = false;
+		$this->addCssClass($this->options, 'btn-group');
+		echo $this->renderGroupBegin() . "\n";
+	}
+
+	/**
+	 * Renders the widget.
+	 */
+	public function run()
+	{
+		echo "\n" . $this->renderGroupEnd();
+		$this->registerPlugin('button');
+	}
+
+	/**
+	 * Renders the opening tag of the button group.
+	 * @return string the rendering result.
+	 */
+	protected function renderGroupBegin()
+	{
+		return Html::beginTag('div', $this->options);
+	}
+
+	/**
+	 * Renders the items and closing tag of the button group.
+	 * @return string the rendering result.
+	 */
+	protected function renderGroupEnd()
+	{
+		return $this->renderItems() . "\n" . Html::endTag('div');
+	}
+
+	/**
+	 * Generates the buttons that compound the group as specified on [[items]].
+	 * @return string the rendering result.
+	 */
+	protected function renderItems()
+	{
+		if (is_string($this->items)) {
+			return $this->items;
+		}
+		$buttons = array();
+		foreach ($this->items as $item) {
+			if (is_string($item)) {
+				$buttons[] = $item;
+				continue;
+			}
+			$label = ArrayHelper::getValue($item, 'label');
+			$options = ArrayHelper::getValue($item, 'options');
+			$buttons[] = Button::widget(array(
+					'label' => $label,
+					'options' => $options,
+					'encodeLabel' => $this->encodeLabels
+				)
+			);
+		}
+		return implode("\n", $buttons);
+	}
+}
\ No newline at end of file