/**
* Updates the articles contexts (in tree for example)
* Called after article->save() && article->save_context()
*
*/
public function update_contexts($id_article)
{
$contexts = $this->article_model->get_lang_contexts($id_article, Settings::get_lang('default'));
strip_html($contexts);
$this->callback[] = array('fn' => 'ION.updateArticleContext', 'args' => array($contexts));
}