as far as i understand, your jquery script was ment to do a live search from a database.
i think, you don-t need id.
did you try the following:
controller:
public function view($id = null)
{
$article = $this->Articles->get($id, [
'contain' => ['Users', 'Comments', 'Tags']
]);
$parsearticle = $this->Articles->find()->extract('Isi');
$this->set('article', $parseartice);
}
in view:
<php echo h($article); ?>