hook_menu() and collapsable menu items with wildcard

Question

I've defined a few routes with hook_menu(), and added these routes to a menu with nesting. This works fine for all static routes, but for any route with a wildcard the 'active-trail' does (understandably) not apply to the menu, and the parent menu item is collapsed. How can I enforce that the parent menu item is open and has 'active-trail' class?

This is the hook_menu() implementation I am using.

function my_module_menu() {
  $items['parent'] = array(
    'title' => t("Parent"),
    'page callback' => 'my_module_parent',
    'access callback' => 'user_is_logged_in',
  );
  $items['parent/child'] = array(
    'title' => t("Child"),
    'page callback' => 'my_module_child',
    'access callback' => 'user_is_logged_in',
  );
  $items['parent/child/%'] = array(
    'title' => t("Child Item"),
    'page callback' => 'my_module_child_item',
    'access callback' => 'user_is_logged_in',
    'page arguments' => array(2)
  );

  return $items;
}

My menu (a custom menu) looks like the following.

• Home
  • Item 1
  • Item 2
  • Parent
    • Child

So if I go to 'parent/child/123' I want the 'parent' and 'child' menu items to be active and not collapsed.

I've tried the Menu Trail by Path module, but it seems to have no effect.

Answer 1

I solved the problem with the Link Trail By Path module. This module add active class for 'parent' and 'child' link.

Answer 2

Found I can achieve this with menu_set_active_item('parent/child');