public function custom_menu($custommenuitems = '') {
        global $CFG;

        if (empty($custommenuitems) && !empty($CFG->custommenuitems)) {
            $custommenuitems = $CFG->custommenuitems;
        }
        $custommenu = new custom_menu($custommenuitems, current_language());
        return $this->render_custom_menu($custommenu);
    }