ss

//form
<form method="post" action="<?php echo base_url().'register/login'; ?>" accept-charset="utf-8" autocomplete="off" role="form" class="form-horizontal">
    						<div class="form-group ">
    							<label for="login" class="sr-only">Username</label>
    								<input type="text" class="form-control" name="username" id="login_value"
    									placeholder="Username" tabindex="1"  />
    						</div>
    						<div class="form-group ">
    							<label for="password" class="sr-only">Password</label>
    								<input type="password" class="form-control" name="password" id="password"
    									placeholder="Password"  tabindex="2" />
    						</div>

    						<br/>
                <a href="#">Lupa password</a>
                <br/><br/>
    						<div class="form-group ">
    								<button type="submit" name="log-me-in" id="submit" tabindex="5" class="btn btn-lg btn-primary">Masuk</button>
    						</div>
    					</form>

//model
//login_page
  public function login_($data){
    $query =$this->db->get_where('tb_user_dw',$data);
    return $query ;
  }


//controller
public function login(){
      $this->form_validation->set_rules('username','Username','trim|max_length[35]|htmlspecialchars|required');
      $this->form_validation->set_rules('password','Username','trim|max_length[35]|htmlspecialchars|required');
        if ($this->form_validation->run()== FALSE) {
          echo "salah";
        }
        else{
          $username = $this->input->post('username');
          $password = $this->input->post('password');
          $data = array(
            'username' => $username,
            'password' => $password
          );
          $cek        =$this->m_user->login_($data);

          if ($cek->num_rows() == 1) {
            foreach ($cek->result() as $sess) {
              $ses_data['login_in']     = "Sudah Login";
              $ses_data['username']     = $sess->username;
              $ses_data['hak_akses']    = $sess->hak_akses;
              $this->session->set_userdata($ses_data);
            }
            if ($this->session->userdata('hak_akses') == 'admin') {
              redirect('home/index');
            }
            else if($this->session->userdata('hak_akses') == 'user'){
              redirect('home/index');
            }
          }
          else{
            echo "BUKAN USER SINI";
          }

        }
      }