Blanke pagina na login

<?php
function login()
	{
		$this->data['title'] = "Inloggen";

		//validate form input
		$this->form_validation->set_rules('identity', 'Gebruikersnaam', 'required');
		$this->form_validation->set_rules('password', 'Wachtwoord', 'required');

		if ($this->form_validation->run() == true)
		{
			//check to see if the user is logging in
			//check for "remember me"
			$remember = (bool) $this->input->post('remember');

			if ($this->ion_auth->login($this->input->post('identity'), $this->input->post('password'), $remember))
			{
				//if the login is successful
				//redirect them back to the home page
				$this->session->set_flashdata('message', $this->ion_auth->messages());
				redirect('/', 'refresh');
			}
			else
			{
				//if the login was un-successful
				//redirect them back to the login page
				$this->session->set_flashdata('message', $this->ion_auth->errors());
				redirect('auth/login', 'refresh'); //use redirects instead of loading views for compatibility with MY_Controller libraries
			}
		}
		else
		{
			//the user is not logging in so display the login page
			//set the flash data error message if there is one
			$this->data['message'] = (validation_errors()) ? validation_errors() : $this->session->flashdata('message');

			$this->data['identity'] = array('name' => 'identity',
				'id' => 'identity',
				'type' => 'text',
				'value' => $this->form_validation->set_value('identity'),
			);
			$this->data['password'] = array('name' => 'password',
				'id' => 'password',
				'type' => 'password',
			);

			$this->_render_page('auth/login', $this->data);
		}
	}
?>

<form action="" method="post" accept-charset="utf-8">
          <div class="form-group has-feedback">
	        <input type="text" class="form-control" placeholder="Gebruikersnaam" name="<?php echo $identity['name']; ?>"/>
            <span class="glyphicon glyphicon-user form-control-feedback"></span>
          </div>
          <!-- -->
          <div class="form-group has-feedback">
            <input type="password" class="form-control" placeholder="Wachtwoord" name="<?php echo $password['name']; ?>"/>
            <span class="glyphicon glyphicon-lock form-control-feedback"></span>
          </div>
          <div class="row">
            <div class="col-xs-8">    
              <div class="checkbox icheck">
                <label>
                  <input type="checkbox" value="1" id="remember"> Onthouden
                </label>
              </div>   
                            
            </div><!-- /.col -->
            <div class="col-xs-4">
              <button type="submit" class="btn btn-primary btn-block btn-flat">Inloggen</button>
            </div><!-- /.col -->
          </div>
      </form>