<option value="{{ $folder->id }}">{!! str_repeat('&nbsp;&nbsp;', $level) !!}{{ $folder->name }}</option>
@if($folder->children && $folder->children->count())
    @foreach($folder->children as $child)
        @include('folders.folder_option_recursive', ['folder' => $child, 'level' => $level + 1])
    @endforeach
@endif
