@if($need_group === true)
	@forelse ($data as $key =>  $class_group)
		@isset($class[$key])

		<optgroup label="{{ $class_group['class_name'] }}">

		@foreach ($class_group as $value)
			@if(is_array($value))
				<option value="{{ $value['id'] }}">{{ $value['name'] }}</option>
			@endif
		@endforeach

		</optgroup>
		
		@endisset
	@empty
		<optgroup label="全部商品都已加入">
		</optgroup>
	@endforelse
@else
	@foreach ($data as $value)
		<option value="{{ $value['id'] }}">{{ $value['name'] }}</option>
	@endforeach
@endif