/**
  * Show product by category
  * @return [type] [description]
  */
 public function showByCategory($id = 0)
 {
     //MENU
     $mainMenu = Category::getParentMenu();
     $allMenu = Category::getAllMenu($mainMenu);
     //HOT PRODUCTS.
     $hotProduct = Product::hotProduct();
     //DISCOUNT PRODUCTS.
     $discountProduct = Product::discountProduct();
     //SAN PHAM CUNG LOAI
     if ($id == 0) {
         $category_product = Category::getCategory_Product();
         $nameCategory = "Tất Cả Sản Phẩm";
         return view('fornindex.detail_category', compact('nameCategory', 'category_product', 'allMenu', 'hotProduct', 'discountProduct'));
     } else {
         $array = Category::getCategory_Product($id);
         $category_product = $array['list'];
         $nameCategory = $array['name'];
         return view('fornindex.detail_category', compact('nameCategory', 'category_product', 'allMenu', 'hotProduct', 'discountProduct'));
     }
 }