/**
  * Ajax Filter list view
  */
 public function filter()
 {
     $this->model->filter(array("status" => array(0, 1)));
     if (Request::post("section")) {
         $section = new CmsSection(Request::post("section"));
         foreach ($section->tree() as $section) {
             $section_ids[] = $section->primval;
         }
         $this->model->filter(array("cms_section_id" => $section_ids));
     }
     parent::filter();
 }