@foreach($business as $business)
  <p><b>{{ $business->name }}</b></p>
  @if(!is_null($business->children))
    <ul>
    @foreach($business->children as $child)
      <li>{{ $child->name }}</li>
    @endforeach
    </ul>
  @endif
@endforeach

<form action="/admin/business" method="post">
  <input name="_token" type="hidden" value="{{ csrf_token() }}"/>
  <input name="parent_id" type="hidden" value="0"/>
  <input name="name" type="text" placeholder="Наименование" value=""/>
  <input type="submit" value="Добавить тип"/>
</form>