Combine arrays with inputs. Key->value binding

I have a div with input fields.

<div class="tabs">
    <div class="ru">
        <input type="text" name="my_vals_ru[]">
        <input type="text" name="my_keys_ru[]">
    </div>
    <div class="en">
        <input type="text" name="my_vals_en[]">
        <input type="text" name="my_keys_en[]">
    </div>
    <div class="de">
        <input type="text" name="my_vals_ge[]">
        <input type="text" name="my_keys_ge[]">
    </div>
</div>

Also, I have a MySQL table, where I store some custom user data in 3 languages (English, German, Russian).

• id
• product_id
• key_en
• val_en
• key_ge
• val_ge
• key_ru
• val_ru

With javascript I can create a lot of such constructions with imputs and send it to process by POST method. Now the question: how can I find out, where the right key->value pair? If it's only one .tabs construction, there's no problem. But what if there're 5 or more? Are there some methods in php or Laravel to manage it?

via J.Tim