laravel : proplem in select option

i have 2 select in form sacend select depend on first

in output display`

<option value="2" data-secid="2"> semoha</option>
                                                                                                                  <option value="3" data-secid="2"> montaza</option>
                                                                                                                  <option value="4" data-secid="2"> marina</option>

` data-secid="2" not normal id

this code

<select name="region_id "  class="form-control subsection" id="regions">
                                                       @foreach( $regions as $keys => $relatedItem )
                                                       <option value=""   data-secid="" > </option>
                                                       @endforeach
                                                       </select>

via Chebli Mohamed