fungsi

    public function edit_user($id)
    {
        $this->data['title'] = $this->lang->line('edit_user_heading');

        if (!$this->ion_auth->logged_in() || (!$this->ion_auth->is_admin() && !($this->ion_auth->user()->row()->id == $id))) {
            redirect('auth', 'refresh');
        }

        $user          = $this->ion_auth->user($id)->row();
        $groups        = $this->ion_auth->groups()->result_array();
        $currentGroups = $this->ion_auth->get_users_groups($id)->result();

        // validate form input
        $this->form_validation->set_rules('first_name', $this->lang->line('edit_user_validation_fname_label'), 'trim|required');
        $this->form_validation->set_rules('last_name', $this->lang->line('edit_user_validation_lname_label'), 'trim|required');
        $this->form_validation->set_rules('phone', $this->lang->line('edit_user_validation_phone_label'), 'trim|required');
        $this->form_validation->set_rules('company', $this->lang->line('edit_user_validation_company_label'), 'trim|required');

        if (isset($_POST) && !empty($_POST)) {

            // do we have a valid request?
            /*
            if ($this->_valid_csrf_nonce() === FALSE || $id != $this->input->post('id'))
            {
            show_error($this->lang->line('error_csrf'));
            }
            */

            // update the password if it was posted
            if ($this->input->post('password')) {
                $this->form_validation->set_rules('password', $this->lang->line('edit_user_validation_password_label'), 'required|min_length[' . $this->config->item('min_password_length', 'ion_auth') . ']|max_length[' . $this->config->item('max_password_length', 'ion_auth') . ']|matches[password_confirm]');
                $this->form_validation->set_rules('password_confirm', $this->lang->line('edit_user_validation_password_confirm_label'), 'required');
            }
            // RULE apa yang ngak jalan??? ini jd pertanyaan... tapi di message kayaknya ada form yang ga ke isi deh
            if ($this->form_validation->run() === TRUE) {
                $data = array(
                    'first_name' => $this->input->post('first_name'),
                    'last_name' => $this->input->post('last_name'),
                    'company' => $this->input->post('company'),
                    'phone' => $this->input->post('phone')
                );

                // update the password if it was posted
                if ($this->input->post('password')) {
                    $data['password'] = $this->input->post('password');
                }

                // Only allow updating groups if user is admin
                if ($this->ion_auth->is_admin()) {
                    // Update the groups user belongs to
                    $groupData = $this->input->post('groups');

                    if (isset($groupData) && !empty($groupData)) {

                        $this->ion_auth->remove_from_group('', $id);

                        foreach ($groupData as $grp) {
                            $this->ion_auth->add_to_group($grp, $id);
                        }

                    }
                }

                // check to see if we are updating the user
                if ($this->ion_auth->update($user->id, $data)) {
                    // redirect them back to the admin page if admin, or to the base url if non admin
                    $this->session->set_flashdata('message', $this->ion_auth->messages());

                    $data = array(
                        'status' => TRUE,
                        'pesan' => 'ERROR:' . validation_errors()
                    );
                    die(json_encode($data));

                    $this->redirectUser();

                } else {
                    // redirect them back to the admin page if admin, or to the base url if non admin
                    $this->session->set_flashdata('message', $this->ion_auth->errors());
                    die('ok2');
                    $this->redirectUser();

                }

            } else {
                //show_error('masih ada yg error:'.validation_errors());
                $data = array(
                    'status' => FALSE,
                    'pesan' => 'ERROR:' . validation_errors()
                );
                die(json_encode($data));
            }
        }

        // set the flash data error message if there is one
        $this->data['message'] = (validation_errors() ? validation_errors() : ($this->ion_auth->errors() ? $this->ion_auth->errors() : $this->session->flashdata('message')));

        // pass the user to the view
        $this->data['user']          = $user;
        $this->data['groups']        = $groups;
        $this->data['currentGroups'] = $currentGroups;

        echo json_encode($this->data);
    }