Just to add to this, I did a search “js_sort_items” after i saw what was in the source code using firebug and found the following reference to the portfolio categories in the following page:

config-templatebuilder/avia-shortcodes/portfolio.php

$output = “<div class=’sort_width_container’ data-portfolio-id='”.avia_post_grid::$grid.”‘ ><div id=’js_sort_items’ >”;

$hide = count($current_page_cats) <= 1 ? “hidden” : “”;

Is this hidden by default in the theme?

Where do you set this in the theme settings to be visible?

thanks.