Get IDs of WordPress Menu Items

function get_ids_of_nav_menu($nav_slug) {                              
 
    // lets get all wordpress menus
    $terms   = get_terms('nav_menu');
 
    // cycle through terms (custom menus) and find $nav_slug
    $term_id = '';
    foreach ($terms as $aterm) {
       if ($aterm->;slug == $nav_slug || $aterm->name == $nav_slug)
            $term_id = $aterm->term_id;    
    }
 
    // get all objects in found menu
    $items        = get_objects_in_term( $term_id , 'nav_menu' );
 
    // get the custom navigations ID's of pages
    $menuids      = array();
    foreach ($items as $uselss => $menu_id) {
       $realitem                       = get_post($menu_id);
       $object_id                      = get_post_meta( $realitem->ID, '_menu_item_object_id', true );
       // get the specified menu order, use as key for sorting after
       $menuids[$realitem->menu_order] = array('menu_id' => $menu_id, 'object_id' => $object_id );
    }
 
    // order by the the custom menu as seen in appearance > menus
    ksort($menuids);
 
    // rebuid & the array
    $return = array();
    foreach ($menuids as $order => $ids) {
       $return[$ids['menu_id']] = $ids['object_id'];
    }
    return $return;
}