Drupal 7 Fetch siblings of node in menu

drupal-7-fetch-siblings-menu.php

<?php

// requires Menu Node API https://drupal.org/project/menu_node

// [ALB] ripped from submenutree.module
// Traverse down the tree to find our node, following in_active_trial
// This code stanza is loosely inspired by menu_set_active_trail()
$item = $current_item;
$tree = menu_tree_all_data($item['menu_name'], $item);
$my_tree = FALSE;
$parent_tree = FALSE;
list($key, $curr) = each($tree);
while ($curr) {
  if ($curr['link']['href'] == $item['href']) {
    $my_tree = $curr['below'];
    $parent_tree = $tree;

    // Clear the children in the parent_tree if it is not an expanded menu item
    if (empty($parent_tree[$key]['link']['expanded'])) {
      $parent_tree[$key]['below'] = array();
    }
    $curr = FALSE;
  }
  else {
    // Move to the child link if it's in the active trail.
    if ($curr['below'] && $curr['link']['in_active_trail']) {
      $tree = $curr['below'];
    }
    list($key, $curr) = each($tree);
  }
}

$siblings = array();
foreach ($parent_tree as $k => $v) {
  if ($v['link']['mlid'] != $item['mlid']) {
    $siblings[] = menu_node_get_node($v['link']['mlid']);
  }
}