Display categories name with the title in accordion slider

Hi,
i’m trying to display category name in accordion slider like this post:
https://kriesi.at/support/topic/display-categories-name-with-the-title-in-accordion-slider/

but editing the enfold\config-templatebuilder\avia-shortcodes\slideshow_accordion.php with the code used for an other user in the above link doesn’t work with latest enfold.

Cheers
Francesco