add

app/Http/Home/HelpController.php

@@ -60,6 +60,7 @@ class HelpController extends HttpBaseController
         $find = DB::table('news')
             ->where('category_id', $categoryInfo->id)
             ->offset($size * ($page - 1))
+            ->orderBy('created_at', 'desc')
             ->limit($size);
         $list = $find->get();