loop through selection

gistfile1.txt

<select id="group-categories" name="group-categories" multiple class="form-control">
    @foreach($categories as $id => $category)
        @if($category == $group->category)
            <option value="{{ $id }}" selected>{{ $category }}</option>
        @else
            <option value="{{ $id }}">{{ $category }}</option>
        @endif
    @endforeach
</select>