As there is not standard tabs function, I have bought a tab-making software Likno Web Tabs Builder   http://www.likno.com/jquery-tabs/index.php

I made tabs with the help of this software, the sumple is here http://www.masterplans.ru/T1/

But now there is a question - how to insert it into website X5?

I tried a few standard actions but without success. You may see them at the screenshots.

The files Tabs Builder compiled are also at the attached zip archive.