Виталий Кузнецов

$rules = array(
    'url' => 'required|unique:products,url,{{$id}}',
);

public function validate($data, $id = null)
    {
        $rules = $this->rules;
        foreach($rules as $keys => $value) {
            $validations = explode('|', $value);
            foreach($validations as $key => $value) {
                $validations[$key] = str_replace('{{$id}}', $id, $value);
            }
            $implode = implode("|", $validations);
            $rules[$keys] = $implode;
        }
        
        return \Validator::make($data, $rules);
    }