public function _add_comment()
    {
        if ($this->input->post('submit_comment'))
        {
            $comment = array(
                'class'     => $this->input->post('class'),
                'parent_id' => $this->input->post('parent_id'),
                'title'     => $this->input->post('title'),
                'text'      => $this->input->post('text'),
            );

            $this->load->model('comments/commentus_form_m');

            if ($this->commentus_form_m->is_valid($comment))
            {
                die('Valid!');

                $this->load->model('comments/commentus_m');
                $this->commentus_m->insert($comment);
            }
            else
            {
                echo validation_errors();
                print_r($comment);
                die('Not valid');
            }
        }
    }