How to show data is have choose in select laravel 5.1

i am have problem in my apps, is the edit i will show data is choose when add data. Can you give me solution?

<select name='id_companies'>
    <option value=''>- Silahkan Pilih Companies -</option>
    <?php 
    $category = DB::table("companies")->get();
    foreach($category as $cat) {
    echo "<option value='$cat->name'>$cat->name</option>";
    }
?>
</select>

thanks

via Chebli Mohamed