@php
$value = null;
for ($i = 0; $i < $child_category->level; $i++) {
    $value .= '-';
}
@endphp
<option value="{{ $child_category->id }}" {{ in_array($child_category->id, $category_id) ? 'selected' : '' }}>
    {{ $child_category->getTranslation('title') . ' ' . $value }}</option>
@if ($child_category->categories)
    @foreach ($child_category->categories as $childCategory)
        @include('categories.child_category_many', ['child_category' => $childCategory , 'category_id' => $category_id])
    @endforeach
@endif