if (isset($_GET['categories']) ){
	$categories = $_GET['categories'];

}
function getCatArticle($param,$categories) {
	$param = ORM::for_table('articles')->where('id_category', $categories)->find_many();
	return $param;
}

$dataArticle = array();
$viewArticles = getCatArticle($dataArticle,$categories);
foreach($viewArticles as $iemArticle) {
	echo $iemArticle['name_articles'].'<br>';

}