posting code tag in form

hello , i started to get on my old code ingiter website recently and i forgot alot of things ,  i need a bit of help for posting code like iframe

because when i try to post things like <iframe src="https://www.facebook.com/plugins/video.php? allowFullScreen="true"></iframe>

the < get changed to &lt;

and i cant seem to find  where to look if someone could point me in the right direction

i have to modify directly in database actualy to get it to work


this is my controller :

PHP Code:

public function news_new()
  {
      $this->form_validation->set_error_delimiters('<div class="alert alert-error">', '</div>');
      if ($this->form_validation->run('news')===FALSE)
      {
      $this->news();
      }
      else
      {
      $this->model_admin->add_news();
      $this->news();
      }
  } 


my model :

PHP Code:

public function add_news()
{
  $data=array (
    'titre_news'=>$this->input->post('titre_news'),
    'introduction'=>$this->input->post('introduction'),
    'contenu_news'=>$this->input->post('contenu_news'),
    'tete_pont'=>$this->input->post('tete_pont'),
    'photo_news'=>$this->input->post('photo_news'),
    );
  $this->db->insert('news', $data);
  $id_emi=$this->db->insert_id();    
  $categorie = $this->input->post('id_categorie');
  foreach ($categorie as $cat)
  {
      $data =array(
   'id_categorie' => $cat,
   'id_news' => $id_emi );
   $this->db->insert('multi_cat_news', $data); 
  }  
} 


and form validation

Code:

'news' => array(
    array(
        'field' => 'titre_news',
        'label' => 'titre_news',
        'rules' => 'required'
   ),
   array(
        'field' => 'id_categorie',
        'label' => 'id_categorie',
        'rules' => 'required'
   ),
   array(
        'field' => 'introduction',
        'label' => 'introduction',
        'rules' => 'required'
   ),
     array(
        'field' => 'photo_news',
        'label' => 'photo_news',
        'rules' => 'required'
   ),
   array(
        'field' => 'contenu_news',
        'label' => 'contenu_news',
        'rules' => 'required'
   )
   ),

thx for helping out

Check to see if you have the global XSS filter on.

oh my forgot about that , yes indeed global xss filter was on
thx a lot