how to insert new variable into laraadmin view

i have for each loop in my view i want to check if the target is equal to some value and insert another value i`

        @foreach ($modules as $module)


                @if ($module->name === "h_car_positions")  <?php $module->name = "history_car_positions" ?>

                @else  <?php $module_name = $module->name; ?>

                  @endif


            <tr>
                <td>{{ $module->id }}</td>
                <td><a href="{{ url(config('laraadmin.adminRoute') . '/modules/'.$module->id) }}">{{ $module->name }}</a></td>
                <td>{{ $module->name_db }}</td>

                <td>{{ Module::itemCount( $module_name ) }}</td>
                <td>
                    <a href="{{ url(config('laraadmin.adminRoute') . '/modules/'.$module->id)}}#fields" class="btn btn-primary btn-xs" style="display:inline;padding:2px 5px 3px 5px;"><i class="fa fa-edit"></i></a>
                    <a href="{{ url(config('laraadmin.adminRoute') . '/modules/'.$module->id)}}#access" class="btn btn-warning btn-xs" style="display:inline;padding:2px 5px 3px 5px;"><i class="fa fa-key"></i></a>
                    <a href="{{ url(config('laraadmin.adminRoute') . '/modules/'.$module->id)}}#sort" class="btn btn-success btn-xs" style="display:inline;padding:2px 5px 3px 5px;"><i class="fa fa-sort"></i></a>
                    <a module_name="{{ $module->name }}" module_id="{{ $module->id }}" class="btn btn-danger btn-xs delete_module" style="display:inline;padding:2px 5px 3px 5px;"><i class="fa fa-trash"></i></a>
                </td>
            </tr>
        @endforeach

i get undefined variable for that variable :$module_name

    @foreach ($modules as $module)

                @php


    $module_name = $module->name;
  switch ($module_name) {
    case "H_car_positions":
       $module_name = "history_car_positions";
        break;

    default:
        $module_name =  $module->name ;
        $module_count =Module::itemCount( $module_name );
}
@endphp 

                <tr>
                    <td>{{ $module->id }}</td>
                    <td><a href="{{ url(config('laraadmin.adminRoute') . '/modules/'.$module->id) }}">{{ $module->name }}</a></td>
                    <td>{{ $module->name_db }}</td>

                    <td>{{ $module_count }}</td>