public function create_category(Request $request)
 {
     $rules = array('category' => 'required');
     $validator = Validator::make($request->all(), $rules);
     if (!$validator->fails()) {
         $value = strtolower($request->category);
         $db_cat = Category::where('name', $value)->first();
         if ($db_cat) {
             return redirect('master/setting/category/list')->with('failed', 'Maaf kategori telah tersedia');
         } else {
             $category = new Category();
             $category->name = $value;
             $category->slug = str_replace(" ", "-", $value);
             $category->save();
             return redirect('master/setting/category/list')->with('success', 'Kategori baru berhasil ditambahkan');
         }
     } else {
         return redirect('master/setting/category/list')->with('failed', 'Silahkan isi Nama Kategori');
     }
 }
 public function add_category(Request $request)
 {
     $rules = array('name' => 'required', 'slug' => 'required');
     $validator = Validator::make($request->all(), $rules);
     if (!$validator->fails()) {
         $category = new Category();
         $category->name = $request->input('name');
         $category->slug = $request->input('slug');
         $category->save();
         return redirect('master/category/list');
     } else {
         return redirect('master/category/create')->with('error', 'Terdapat form kosong');
     }
 }