Penempatan Memasang reCaptcha google di web Sikolag Ci

Assalam,.. tergantung gan, mau ditambahkan pada modul apa g-recaptcha?
jika pada komentar berita berarti penambahan kode g-recaptcha di atas pada controllers berita,

Assalam,.. ini untuk form login gan..
 
ini kan script login
-->
		function index(){
		if (isset($_POST['submit'])){
			$username = $this->input->post('a');
			$password = hash("sha512", md5($this->input->post('b')));
			$cek = $this->model_app->cek_login($username,$password,'users');
		    $row = $cek->row_array();
		    $total = $cek->num_rows();
			if ($total > 0){
				$this->session->set_userdata('upload_image_file_manager',true);
				$this->session->set_userdata(array('username'=>$row['username'],
								   'level'=>$row['level'],
                                   'id_session'=>$row['id_session']));
 
 
    				redirect('Administrator/home');
 
			}else{
 
 
				$data['title'] = 'Username atau Password salah!';
				$this->load->view('administrator/view_login',$data);
			}
		}else{
 
			$data['title'] = 'Administrator › Log In';
			$this->load->view('administrator/view_login',$data );
		}
	}
 

Assalam,.. jadi begini berarti :
<?php 
function index(){
	if (isset($_POST['submit'])){
		$recaptcha = $this->input->post('g-recaptcha-response');
	    $response = $this->recaptcha->verifyResponse($recaptcha);
	    if ($this->form_validation->run() == FALSE || !isset($response['success']) || $response['success'] <> true) {
	    	redirect('Administrator'); // gagal Login dan kembali ke halaman login
	    }else{
			$username = $this->input->post('a');
			$password = hash("sha512", md5($this->input->post('b')));
			$cek = $this->model_app->cek_login($username,$password,'users');
		    $row = $cek->row_array();
		    $total = $cek->num_rows();
			if ($total > 0){
				$this->session->set_userdata('upload_image_file_manager',true);
				$this->session->set_userdata(array('username'=>$row['username'],
								   'level'=>$row['level'],
	                               'id_session'=>$row['id_session']));
					redirect('Administrator/home');
			}else{
				$data['title'] = 'Username atau Password salah!';
				$this->load->view('administrator/view_login',$data);
			}
		}
	}else{
		$data['title'] = 'Administrator › Log In';
		$this->load->view('administrator/view_login',$data );
	}
}

Assalam,.. 
sudah di coba tapi gagal gan..balik lagi di form login
redirect('Administrator');
 
 

Assalam,.. 
ga bisa gan..tetap aja langsung redirect('Administrator');

Assalam,.. 
sudah mas  Bukhari al Muslim..thanks,,.