protected function groupArticles($articles, $index)
{
\UArray::doGroupBy($articles, $index);
foreach ($articles as $key => $groupedArticles) {
$articles[$key] = [];
$articles[$key]['id'] = \UString::stripSpecialChar($key);
$articles[$key]['name'] = $key;
$articles[$key]['articles'] = $groupedArticles;
}
return $articles;
}
