Insert data with foreach loop in laravel

<div class="form-group">

    <label>Tags :</label>

<select class="form-control select-multiple-tags" multiple="multiple" data-fouc name="tags[]" >

@foreach($tags as $tag)

                     <option value="{{$tag->tag}}">{{$tag->tag}}</option>

                    @endforeach

            </select>

</div>  

Controller: 

use Input;

 $input = $request->all();

        if ($input['tags'] !='') {

           foreach($input['tags'] as $key => $row){

                $tag=new tag;

                $tag->tag=$input['tags'][$key];

                $tag->product_id=$product->id;

                $tag->created_by=$user->id;

                $tag->save();

            }

        }