Filtering array values

I have a model :

PHP Code:

           public function biens_vente()
            {
                        $query = $this->db->select('')
                        ->from('biens')
                        ->where('actif', '1')
                        ->where('rent','0')
                        ->get();

                        if($query->num_rows()!==0)
                        {
                                    return $query->result();
                        }
                        else
                        {
                                    return FALSE;
                        }
            } 


and a Controller :

PHP Code:

public function ventes()
            {
                        if($this->Biens_model->biens_vente()== FALSE)
                        {
                              $this->data['erreur'] = "BLABLABLA";
                        }
                        else
                        {
                              $this->data['biens'] = $this->Biens_model->biens_vente();
                        }
                        $this->data['title'] = "VENTE";
                        $this->render('vente_view');
            } 


In the results I got rows like 'slide1' 'slide2' .... if the row is empty,
I would like to filter the empty rows as I would with an array_filter() before sending to view
How can I do that properly ?