.navbar-toggler-icon {
background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
<input type="radio" name="A" value="1">
<input type="radio" name="A" value="2">
switch($_POST['A'])
{
case "1":
$category .= 'A1;
break;
case "2":
$category .= 'A2';
break;
}
$url = '/cart/ID/'.$category;