/** * Returns the base navigation path for the tabs. * May return NULL if tab display is disabled. */ public static function getTabNavigationPath() { if (self::$tab_navigation_path === false && self::getTabNavigation()) { foreach (self::getTabNavigation() as $subpath => $navigation) { if ($navigation->isActive()) { self::$tab_navigation_path = $subpath; } } } return self::$tab_navigation_path; }