/**
  * Show the form for editing the specified resource.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function edit($id)
 {
     $category = Category::find($id);
     $categories = Category::withDepth()->get();
     $categories = $categories->toTree();
     return view('categories.edit', ['category' => $category, 'categories' => $categories]);
 }
 public function edit($id)
 {
     $product = Product::with('categories')->find($id);
     $categories = Category::withDepth()->get();
     $categories_id = array();
     foreach ($product->categories as $category) {
         $categories_id[] = $category->id;
     }
     $categories = $categories->toTree();
     return view('products.edit', ['product' => $product, 'categories' => $categories, 'categories_id' => $categories_id]);
 }