php laravel

            <div class="form-group col-md-8">
                <label>Exercicio</label>
                <select name="especificidade[]" multiple="multiple" class="form-control select-search">
                    {{$i=0}}
                    @foreach($exercs as $item)
                <option value="{{ $item->descricao }}" @if($item->descricao ==$exer[$i]) selected @endif>{{$item->descricao}}</option>
                        {{$i++}}
                    @endforeach
                </select>
            </div>