public static function add_sidebar_category()
 {
     $obj = new TMM_Custom_Sidebars();
     $sidebar_id = $_REQUEST['sidebar_id'];
     $cat_id = $_REQUEST['cat_id'];
     $data = array();
     $data['select'] = $obj->get_categories_select('', "sidebars[" . $sidebar_id . "][cat][" . $cat_id . "]", "sidebars_cat_" . $sidebar_id);
     echo TMM::draw_html('custom_sidebars/add_sidebar_page', $data);
     exit;
 }