Fixed `yii\bootstrap\ButtonDropdown` renders two buttons have same with id if 'split' is enabled

ButtonDropdown.php

@@ -74,6 +74,7 @@ class ButtonDropdown extends Widget
      */
     public function run()
     {
+        // @todo use [[options]] instead of [[containerOptions]] and introduce [[buttonOptions]] before 2.1 release
         Html::addCssClass($this->containerOptions, 'btn-group');
         $options = $this->containerOptions;
         $tag = ArrayHelper::remove($options, 'tag', 'div');
@@ -102,6 +103,7 @@ class ButtonDropdown extends Widget
             $options = $this->options;
             $this->options['data-toggle'] = 'dropdown';
             Html::addCssClass($this->options, 'dropdown-toggle');
+            unset($this->options['id']);
             $splitButton = Button::widget([
                 'label' => '<span class="caret"></span>',
                 'encodeLabel' => false,

CHANGELOG.md

@@ -9,6 +9,7 @@ Yii Framework 2 bootstrap extension Change Log
 - Enh #41: Added `submenuOptions` support at `yii\bootstrap\Dropdown` (spikyjt, klimov-paul)
 - Enh #42: Added support for the glyphicons via `yii\bootstrap\Html::icon()` (klimov-paul)
 - Enh #43: Added support for the static form controls via `yii\bootstrap\Html` (klimov-paul)
+- Enh #44: Fixed `yii\bootstrap\ButtonDropdown` renders two buttons have same with id if 'split' is enabled (klimov-paul)
 
 
 2.0.4 May 10, 2015