diff --git a/framework/yii/bootstrap/Nav.php b/framework/yii/bootstrap/Nav.php
index 7a29ecd..548fe19 100644
--- a/framework/yii/bootstrap/Nav.php
+++ b/framework/yii/bootstrap/Nav.php
@@ -57,14 +57,8 @@ class Nav extends Widget
 	 * - linkOptions: array, optional, the HTML attributes of the item's link.
 	 * - options: array, optional, the HTML attributes of the item container (LI).
 	 * - active: boolean, optional, whether the item should be on active state or not.
-	 * - items: array, optional, the configuration of specify the item's dropdown menu. You can optionally set this as
-	 *   a string (ie. `'items'=> Dropdown::widget(array(...))`
-	 *   - important: there is an issue with sub-dropdown menus, and as of 3.0, bootstrap won't support sub-dropdown.
-	 *
-	 * **Note:** Optionally, you can also use a plain string instead of an array element.
-	 *
-	 * @see https://github.com/twitter/bootstrap/issues/5050#issuecomment-11741727
-	 * @see [[Dropdown]]
+	 * - dropdown: array|string, optional, the configuration array for creating a [[Dropdown]] widget,
+	 *   or a string representing the dropdown menu. Note that Bootstrap does not support sub-dropdown menus.
 	 */
 	public $items = array();
 	/**
@@ -120,7 +114,7 @@ class Nav extends Widget
 		}
 		$label = $this->encodeLabels ? Html::encode($item['label']) : $item['label'];
 		$options = ArrayHelper::getValue($item, 'options', array());
-		$dropdown = ArrayHelper::getValue($item, 'items');
+		$dropdown = ArrayHelper::getValue($item, 'dropdown');
 		$url = Html::url(ArrayHelper::getValue($item, 'url', '#'));
 		$linkOptions = ArrayHelper::getValue($item, 'linkOptions', array());
 
@@ -133,11 +127,12 @@ class Nav extends Widget
 			$this->addCssClass($options, 'dropdown');
 			$this->addCssClass($urlOptions, 'dropdown-toggle');
 			$label .= ' ' . Html::tag('b', '', array('class' => 'caret'));
-			$dropdown = is_string($dropdown)
-				? $dropdown
-				: Dropdown::widget(array('items' => $item['items'], 'clientOptions' => false));
+			if (is_array($dropdown)) {
+				$dropdown['clientOptions'] = false;
+				$dropdown = Dropdown::widget($dropdown);
+			}
 		}
 
 		return Html::tag('li', Html::a($label, $url, $linkOptions) . $dropdown, $options);
 	}
-}
\ No newline at end of file
+}
diff --git a/framework/yii/bootstrap/NavBar.php b/framework/yii/bootstrap/NavBar.php
index cbcd2d3..17a938c 100644
--- a/framework/yii/bootstrap/NavBar.php
+++ b/framework/yii/bootstrap/NavBar.php
@@ -73,7 +73,7 @@ class NavBar extends Widget
 	 * @param array|string $url the URL for the brand's hyperlink tag. This parameter will be processed by [[Html::url()]]
 	 * and will be used for the "href" attribute of the brand link. Defaults to site root.
 	 */
-	public $brandRoute = '/';
+	public $brandUrl = '/';
 	/**
 	 * @var array the HTML attributes of the brand link.
 	 */
@@ -98,10 +98,6 @@ class NavBar extends Widget
 	 * Optionally, you can also use a plain string instead of an array element.
 	 */
 	public $items = array();
-	/**
-	 * @var string the generated brand url if specified by [[brandLabel]]
-	 */
-	protected $brand;
 
 
 	/**
@@ -113,7 +109,6 @@ class NavBar extends Widget
 		$this->clientOptions = false;
 		$this->addCssClass($this->options, 'navbar');
 		$this->addCssClass($this->brandOptions, 'brand');
-		$this->brand = Html::a($this->brandLabel, $this->brandRoute, $this->brandOptions);
 	}
 
 	/**
@@ -124,7 +119,7 @@ class NavBar extends Widget
 		echo Html::beginTag('div', $this->options);
 		echo $this->renderItems();
 		echo Html::endTag('div');
-		$this->getView()->registerAssetBundle('yii/bootstrap');
+		$this->getView()->registerAssetBundle(self::$responsive ? 'yii/bootstrap/responsive' : 'yii/bootstrap');
 	}
 
 	/**
@@ -138,17 +133,17 @@ class NavBar extends Widget
 			$items[] = $this->renderItem($item);
 		}
 		$contents = implode("\n", $items);
-		if (self::$responsive === true) {
+		$brand = Html::a($this->brandLabel, $this->brandUrl, $this->brandOptions);
+
+		if (self::$responsive) {
 			$this->getView()->registerAssetBundle('yii/bootstrap/collapse');
-			$contents =
-				Html::tag('div',
+			$contents = Html::tag('div',
 					$this->renderToggleButton() .
-					$this->brand . "\n" .
+					$brand . "\n" .
 					Html::tag('div', $contents, array('class' => 'nav-collapse collapse navbar-collapse')),
 					array('class' => 'container'));
-
 		} else {
-			$contents = $this->brand . "\n" . $contents;
+			$contents = $brand . "\n" . $contents;
 		}
 
 		return Html::tag('div', $contents, array('class' => 'navbar-inner'));
@@ -190,4 +185,4 @@ class NavBar extends Widget
 			'data-target' => 'div.navbar-collapse',
 		));
 	}
-}
\ No newline at end of file
+}