return $this->redirect($this->referer());

$this->set('redirect', $this->referer());

echo $this->Form->hidden('redirect', ['value' => $redirect]);

if (isset($this->request->data['redirect'])) {
    $this->redirect($this->request->data['redirect']);
}

public function redirect($url, $status = 302)
    {
        if ($this->request->getData('redirect', '')) {
            return parent::redirect($this->request->getData('redirect'), $status);
        }
        return parent::redirect($url, $status);
    }

public function beforeRender(Event $event)
    {
        $this->set('redirect', $this->referer());
    }