TbHtml::openTag PHP Method

    public static function openTag($tag, $htmlOptions = array())
    {
        return self::tag($tag, $htmlOptions, false, false);
    }

 /**
  * Runs the widget.
  */
 public function run()
 {
     list($name, $id) = $this->resolveNameID();
     $id = $this->resolveId($id);
     echo TbHtml::openTag('div', array('class' => 'select2'));
     if ($this->hasModel()) {
         if ($this->asDropDownList) {
             echo TbHtml::activeDropDownList($this->model, $this->attribute, $this->data, $this->htmlOptions);
         } else {
             echo TbHtml::activeHiddenField($this->model, $this->attribute, $this->htmlOptions);
         }
     } else {
         if ($this->asDropDownList) {
             echo TbHtml::dropDownList($name, $this->value, $this->data, $this->htmlOptions);
         } else {
             echo TbHtml::hiddenField($name, $this->value, $this->htmlOptions);
         }
     }
     echo '</div>';
     if ($this->assetPath !== false) {
         $this->publishAssets($this->assetPath);
         $this->registerCssFile('/select2.css');
         if ($this->registerJs) {
             $this->registerScriptFile('/select2.js', CClientScript::POS_END);
         }
     }
     if ($this->bindPlugin) {
         $options = !empty($this->pluginOptions) ? CJavaScript::encode($this->pluginOptions) : '';
         $this->getClientScript()->registerScript(__CLASS__ . '#' . $id, "jQuery('#{$id}').select2({$options});");
     }
 }