Can I re-use validator instance in the controller?

I use AJAX to send my request, and I want to format errors in special way (still JSON though. I want to change data structure of error and add some flags to it)

So since apparently $this->validate just would print out errors without my permission! And I have no control over it, I have to use static method of validator

$whitelist = [
    'title'=>'required',
    'slug'=>'present' ,
    'text'=>'present'
];

$validation = Validator::make($request->all(), $whitelist);
if($validation->fails())
{
    format_output_likeIwant($validation->messages()->messages());
}

$another_whitelist = [
    'some_other_info'=>'required',
];

Just out of curiosity, is there any way for me to validate my $another_whitelist with my existing instance? Or should I create a new instance of validator for each list?

By the way, reason for having 2 different validation array is, I'm using this whitelists/arrays to populate my model instance before save/update in database and avoid writing lots of extra code in case of big tables. 2 list here belong to different model/tables (see here for example)

I've looked in the laravel documentation, it seems all of the examples assume single validation list

via Chebli Mohamed