public static function create_tree_recursiv array elements parentId le

public static function create_tree_recursive(array $elements, $parentId = 0, $level = 0) {
        $branch = array();
        foreach ($elements as $element) {
            if ($element['PARENT_ID'] == $parentId) {
                $children = self::create_tree_recursive($elements, $element['ID'], $level++);
                if ($children) {
                    $element['children'] = $children;
                }
                $element['NAME_ru_ru'] = str_repeat('.', $level) . $element['NAME_ru_ru'];
                $branch[] = $element;
            }
        }
        return $branch;
    }