+$_wp_submenu_nopriv = array();
+$_wp_menu_nopriv = array();
+// Loop over submenus and remove pages for which the user does not have privs.
+foreach ($submenu as $parent => $sub) {
+ foreach ($sub as $index => $data) {
+ if ( ! current_user_can($data[1]) ) {
+ unset($submenu[$parent][$index]);
+ $_wp_submenu_nopriv[$parent][$data[2]] = true;
+ }
+ }
+
+ if ( empty($submenu[$parent]) )
+ unset($submenu[$parent]);
+}
+
+// Loop over the top-level menu.
+// Menus for which the original parent is not acessible due to lack of privs will have the next
+// submenu in line be assigned as the new menu parent.
+foreach ( $menu as $id => $data ) {
+ if ( empty($submenu[$data[2]]) )
+ continue;
+ $subs = $submenu[$data[2]];
+ $first_sub = array_shift($subs);
+ $old_parent = $data[2];
+ $new_parent = $first_sub[2];
+ // If the first submenu is not the same as the assigned parent,
+ // make the first submenu the new parent.
+ if ( $new_parent != $old_parent ) {
+ $_wp_real_parent_file[$old_parent] = $new_parent;
+ $menu[$id][2] = $new_parent;
+
+ foreach ($submenu[$old_parent] as $index => $data) {
+ $submenu[$new_parent][$index] = $submenu[$old_parent][$index];
+ unset($submenu[$old_parent][$index]);
+ }
+ unset($submenu[$old_parent]);
+ $_wp_submenu_nopriv[$new_parent] = $_wp_submenu_nopriv[$old_parent];
+ }
+}
+