The user id is in the data, but not the cache key - you're going to be using the data for one user, as the favorites for all users; you need to account for clearing the cache when favorites data changes. You seem to be using the banner variables in multiple actions - put the code to set that in the app controller.

1. I could use two `Cache::remember` in same method ?

2. I coudl join this two `Cache::remember` (I need change the first param)?

    public function favoriteStores()
    {
        $userId = $this->Auth->user('id');
        $username = $this->Auth->user('username');
 
        list($fullBanners, $smallBanners,) = Cache::remember(
            'banners', function(){
            $this->loadModel('Banners');
            $fullBanners = $this->Banners->full();
            $smallBanners = $this->Banners->small();
            return [$fullBanners, $smallBanners];
        });
 
        list($stores, $favoriteStores) = Cache::remember(
            'stores', function(){
            $stores = $this->Stores->myStores($this->Auth->user('id'));
            $favoriteStores = $this->Stores->favoriteStores();
            return [$stores, $favoriteStores];
        });
 
        $this->set(compact('fullBanners', 'smallBanners', 'userId', 'username',
            'stores', 'favoriteStores'));
    }