diff --git a/includes/menu.inc b/includes/menu.inc
index d127df6..7ad6651 100644
--- a/includes/menu.inc
+++ b/includes/menu.inc
@@ -994,16 +994,19 @@ function menu_get_object($type = 'node', $position = 1, $path = NULL) {
  *
  * @param $menu_name
  *   The name of the menu.
+ * @param $skip_hidden
+ *   (optional) Improve performance by skipping hidden menu links in tree
+ *   see _menu_tree_check_access
  *
  * @return
  *   A structured array representing the specified menu on the current page, to
  *   be rendered by drupal_render().
  */
-function menu_tree($menu_name) {
+function menu_tree($menu_name, $skip_hidden = FALSE) {
   $menu_output = &drupal_static(__FUNCTION__, array());
 
   if (!isset($menu_output[$menu_name])) {
-    $tree = menu_tree_page_data($menu_name);
+    $tree = menu_tree_page_data($menu_name, $skip_hidden);
     $menu_output[$menu_name] = menu_tree_output($tree);
   }
   return $menu_output[$menu_name];
@@ -1215,6 +1218,9 @@ function menu_tree_get_path($menu_name) {
  *   (optional) Whether to only return the links in the active trail (TRUE)
  *   instead of all links on every level of the menu link tree (FALSE). Defaults
  *   to FALSE. Internally used for breadcrumbs only.
+ * @param $skip_hidden
+ *   (optional) Improve performance by skipping hidden menu links in tree
+ *   see _menu_tree_check_access
  *
  * @return
  *   An array of menu links, in the order they should be rendered. The array
@@ -1223,7 +1229,7 @@ function menu_tree_get_path($menu_name) {
  *   submenu below the link if there is one, and it is a subtree that has the
  *   same structure described for the top-level array.
  */
-function menu_tree_page_data($menu_name, $max_depth = NULL, $only_active_trail = FALSE) {
+function menu_tree_page_data($menu_name, $max_depth = NULL, $only_active_trail = FALSE, $skip_hidden = FALSE) {
   $tree = &drupal_static(__FUNCTION__, array());
 
   // Check if the active trail has been overridden for this menu tree.
@@ -2382,11 +2388,14 @@ function menu_set_active_item($path) {
  *   Menu trail to set; the value is saved in a static variable and can be
  *   retrieved by menu_get_active_trail(). The format of this array should be
  *   the same as the return value of menu_get_active_trail().
+ * @param $skip_hidden
+ *   (optional) Improve performance by skipping hidden menu links in tree
+ *   see _menu_tree_check_access
  *
  * @return
  *   The active trail. See menu_get_active_trail() for details.
  */
-function menu_set_active_trail($new_trail = NULL) {
+function menu_set_active_trail($new_trail = NULL, $skip_hidden = FALSE) {
   $trail = &drupal_static(__FUNCTION__);
 
   if (isset($new_trail)) {
@@ -2412,7 +2421,7 @@ function menu_set_active_trail($new_trail = NULL) {
       // Pass TRUE for $only_active_trail to make menu_tree_page_data() build
       // a stripped down menu tree containing the active trail only, in case
       // the given menu has not been built in this request yet.
-      $tree = menu_tree_page_data($preferred_link['menu_name'], NULL, TRUE);
+      $tree = menu_tree_page_data($preferred_link['menu_name'], NULL, TRUE, $skip_hidden);
       list($key, $curr) = each($tree);
     }
     // There is no link for the current path.