Controller Login

<?php

class Login extends CI_Controller {

    function __construct() {
        parent::__construct();
        //session_start();
        $this->load->model(array('user_model'));
        $this->load->helper(array('form', 'url', 'html', 'date', 'form_helper', 'file'));
        $this->load->library(array('form_validation', 'table', 'template', 'session', 'simple_login'));
        $this->load->database();
        $this->load->helper('url');
    }

    function index() {
        $session = $this->session->userdata('isLogin');
        if ($session == FALSE) {
            $this->template->displayUser('template_user/home');
        } else {
            if ($this->session->userdata('status') == 'Super Admin') {
                redirect('dashboard');
            } else if ($this->session->userdata('status') == 'Admin') {
                redirect('admin');
            } else if ($this->session->userdata('status') == 'User') {
                redirect('developer');
            }
        }
    }

    function proses() {
        $this->form_validation->set_rules('username', 'username', 'required');
        $this->form_validation->set_rules('password', 'password', 'required');

        if ($this->form_validation->run() == FALSE) {
            $this->template->displayUser('template_user/home');
        } else {

            $usr = $this->input->post('username');
            $psw = $this->input->post('password');
            //$u = mysqli_real_escape_string($usr);
            //$p = (mysqli_real_escape_string($psw));
            $cek = $this->user_model->cek($usr, $psw);
            if ($cek->num_rows() > 0) {
                //login berhasil, buat session
                foreach ($cek->result() as $qad) {
                    $sess_data['id_user'] = $qad->id_user;
                    $sess_data['nama'] = $qad->nama;
                    $sess_data['username'] = $qad->username;
                    $sess_data['status'] = $qad->status;
                    $this->session->set_userdata('isLogin', TRUE);
                    $this->session->set_userdata($sess_data);
                }
                if ($this->session->userdata('status') == 'Super Admin') {
                    redirect('dashboard');
                } else if ($this->session->userdata('status') == 'Admin') {
                    redirect('admin');
                } else if ($this->session->userdata('status') == 'User') {
                    redirect('developer');
                }
            } else {
                $this->session->set_flashdata('result_login', '<br>Anda belum Login!<br>Username atau Password yang anda masukkan salah.');
                redirect('login');
            }
        }
    }

    function logout() {
        $this->session->sess_destroy();
        redirect('maps');
    }
}