validasi CI

function user_register()
    {
$this->load->library('form_validation');

 $this->form_validation->set_rules('user_name', 'Nama Lengkap', 'required');
 $this->form_validation->set_rules('username', 'Username', 'required');
 $this->form_validation->set_rules('pwd', 'Password', 'required|matches[cpwd]');
 $this->form_validation->set_rules('cpwd', 'Password Confirmation', 'required');
 $this->form_validation->set_rules('user_email', 'Email', 'required|valid_email');
 $this->form_validation->set_rules('gender', 'Gender', 'required');

 if ($this->form_validation->run() == FALSE)
 {

        $this->load->model('register_model');
        $reg['query'] = $this->register_model->add();
        if($reg['query']) {
            $content['query'] = $this->home_model->lihat_home();
            if($content['query']) {
                $profile['query'] = $this->home_model->lihat_profile();
                if($profile['query']) {
                    $slide['query'] = $this->gambar_model->lihat_front();
                    if($slide['query']) {

                    $expiration = time()-7200;
                    $this->db->query("DELETE FROM captcha WHERE captcha_time < ".$expiration);
                    $sql = "SELECT COUNT(*) AS count FROM captcha WHERE word = ? AND ip_address = ? AND captcha_time > ?";
                    $binds = array($_POST['captcha'], $this->input->ip_address(), $expiration);
                    $query = $this->db->query($sql, $binds);
                    $row = $query->row();

                        if ($row->count == 0){
                                 $this->load->helper('captcha');

                                $vals = array(
                                        'img_path'      => './captcha/',
                                        'img_url'       => 'http://lowongankerja.rifa.asia/captcha/',
                                );

                                $cap = create_captcha($vals);
                                          $time=$cap['time'];

                                $data = array(
                                        'captcha_time'  => $cap['time'],
                                        'ip_address'    => $this->input->ip_address(),
                                        'word'          => $cap['word']
                                );

                                $query = $this->db->insert_string('captcha', $data);
                                $this->db->query($query);

                                $isi['image'] = $cap['image'];

                                $array = array('home' => $this->load->view('home',$content,true),
                                                    'profile' => $this->load->view('profile',$profile,true),
                                                    'contact' => $this->load->view('contact', '',true),
                                                    'register' => $this->load->view('register_error', $isi,true),
                                                    'slide' => $this->load->view('slide',$slide,true) );

                              $this->load->view('index', $array);
                        }else {

                            $array = array('home' => $this->load->view('home',$content,true),
                                                'profile' => $this->load->view('profile',$profile,true),
                                                'contact' => $this->load->view('contact', '',true),
                                                'register' => $this->load->view('register_sukses', '',true),
                                                'slide' => $this->load->view('slide',$slide,true) );

                            $this->load->view('index', $array);
                        }   }   }   }

        }else {
            $content['query'] = $this->home_model->lihat_home();
                if($content['query']) {
                    $profile['query'] = $this->home_model->lihat_profile();
                        if($profile['query']) {
                            $slide['query'] = $this->gambar_model->lihat_front();
                                if($slide['query']) {
                                    $array = array('home' => $this->load->view('home',$content,true),
                                                        'profile' => $this->load->view('profile',$profile,true),
                                                        'contact' => $this->load->view('contact', '',true),
                                                        'register' => $this->load->view('register_gagal', '',true),
                                                        'slide' => $this->load->view('slide',$slide,true) );

                                    $this->load->view('index', $array);
                                }
        }   }   }
    }else{
redirect('register');
}
}