public static function addSubMenu($parentSlug, $slug, $title, $url, $capability) { if (self::menuExists($parentSlug)) { if (!self::subMenuExists($parentSlug, $slug)) { self::$menus = Hash::insert(self::$menus, $parentSlug . '.sub_menus.' . $slug, array('title' => $title, 'url' => $url, 'capability' => $capability)); } } }