code: public function run()
      {
          $this->registerPlugin('tabs');
          echo Html::beginTag('div', $this->containerOptions);
          echo parent::run();
          echo $this->renderItems($this->items);
          echo Html::endTag('div');
          //return Html::tag($this->tagName, $this->encodeLabel ? Html::encode($this->label) : $this->label, $this->options);
      }
docs: Renders the widget.