public function getHeaderHtml() { $items = $this->getActiveChannelItems(); $data = array('target_css_class' => 'listing-profile-title', 'style' => 'max-height: 120px; overflow: auto; width: 200px;', 'items' => $items); $dropDownBlock = $this->getLayout()->createBlock('M2ePro/adminhtml_widget_button_dropDown'); $dropDownBlock->setData($data); // --------------------------------------- return parent::getHeaderHtml() . $dropDownBlock->toHtml(); }