private function fillTree(&$categories, $id_category)
{
$tree = array();
foreach ($categories[$id_category] as $category) {
$tree[$category['id_category']] = $category;
if (!empty($categories[$category['id_category']])) {
$tree[$category['id_category']]['children'] = $this->fillTree($categories, $category['id_category']);
} elseif ($result = BlogCategory::hasChildren($category['id_category'], $this->getLang(), false, $this->getShop()->id)) {
$tree[$category['id_category']]['children'] = array($result[0]['id_category'] => $result[0]);
}
}
return $tree;
}