这个问题我以前就发现了，不过如果你懂一点PHP和laravel框架的话，可以自己修改控制器

我贴一下我修改的控制器IndexController.php 修改第157行,仅供参考

public function topic( $categorySlug='all')
{

$currentCategoryId = 0;
if( $categorySlug != 'all' ){
$category = Category::where("slug","=",$categorySlug)->first();
if(!$category){
            abort(404);
        }
$currentCategoryId = $category->id;
    }

$categories = load_categories('tags');

if ($currentCategoryId > 0 ){
$topics = Tag::where("category_id","=",$currentCategoryId)->orderBy('followers','DESC')->paginate(20);
    }
else{
$topics = Tag::where("category_id",">=",0)->orderBy('followers','DESC')->paginate(20);
    }

return view('theme::home.topic')->with(compact('category','topics','categories','currentCategoryId','categorySlug'));
}

PS:我只是为了测试一下空格回复是否产生BUG，提交成功，结果还真成功了，又无法删除，为了证明我不是捣乱的人，就重新编辑认真的回复了一下