function getHierarchy($parent = 0)
{
$hier = navigationmodule::_getHierarchy();
if ($parent == 0) {
return $hier;
}
$new_hier = array();
$subtree_depth = 0;
foreach (array_keys($hier) as $sid) {
if ($sid == $parent) {
$subtree_depth = $hier[$sid]->depth;
}
if ($subtree_depth) {
// Found our sub tree
if ($hier[$sid]->depth > $subtree_depth) {
$new_hier[$hier[$sid]->id] = $hier[$sid];
} else {
break;
}
}
}
return $new_hier;
}
