function saveCategory($artID)
{
    require_once ROOT . "DBInterface/categoryArticleDB.php";
    $categoryArticleDB = new CategoryArticleDB();
    $categoryArticleDB->deleteAllCategorysByArticle($artID);
    if (isset($_POST['category'])) {
        foreach ($_POST['category'] as $catID) {
            $categoryArticleDB->insertCategoryArticle($artID, $catID);
        }
    }
}