<select name="marketed_by" id="marketed_by" class="form-control" required>
  <option value="">Select Marketer</option>
  @foreach($marketer as $m)
  <option value="{{ $m->id }}">{{ $m->firstname }} {{$m->lastname}}</option>
  @endforeach
</select>
<div class="badge badge-danger mt-1 block text-center">{{$error}}</div>