Fetch children node from the current menu in Drupal 7

drupal-fetch-children-node-menu.php

<?php

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

$children = array();
$trail = menu_get_active_trail();
if (count($trail)) {
  $current_item = $trail[count($trail) - 1];
  $parameters = array(
    'active_trail' => array($current_item['plid']),
    'only_active_trail' => FALSE,
    'min_depth' => $current_item['depth']+1,
    'max_depth' => $current_item['depth']+1,
    'conditions' => array('plid' => $current_item['mlid']),
  );
  $menu_tree_children = menu_build_tree($current_item['menu_name'], $parameters);
  foreach ($menu_tree_children as $key => $value) {
    $children[] = menu_node_get_node($value['link']['mlid']);
  }
}