Laravel sélectionnez la valeur multiple dans le formulaire Modifier
<select name="cities[]" class="city form-control" data-placeholder="Pilih Kota" style="width: 100%;" multiple="multiple">
@foreach($cities as $city)
@if(in_array($city->id, $zoneCityIds))
<option value="{{ $city->id }}" selected="true">{{ $city->name }}</option>
@else
<option value="{{ $city->id }}">{{ $city->name }}</option>
@endif
@endforeach
</select>
samsul aripin