CategoriesModule::filterDepth PHP Method

    public function filterDepth(&$Categories, $startDepth, $endDepth)
    {
        if ($startDepth != 1 || $endDepth) {
            foreach ($Categories as $i => $Category) {
                if (val('Depth', $Category) < $startDepth || $endDepth && val('Depth', $Category) > $endDepth) {
                    unset($Categories[$i]);
                }
            }
        }
    }