public function upload_feature(Request $request)
{
$this->validate($request, Feature::rules());
$feature = Feature::where('id', $request->feature_id)->first();
$feature->href = $request->href;
$feature->btnclass = $request->btnclass;
$feature->innerhtml = $request->innerhtml;
$feature->save();
session()->flash('message', '功能更新成功');
return Redirect::back();
}
