If you use entity translation and the node is attached to different menus here is a code that works
if (function_exists('menu_node_get_links')) {
global $language;
$lang = $language->language;
$node = node_load(intval(4));
if (isset($node->menu_node_links)) {
foreach ($node->menu_node_links as $mlid => $data) {
if ($mlid->language == $data->lang) {
return($mlid);
}
}
}
}