I found this topic http://www.jdownloads.com/forum/index.php?topic=6930.msg26941#msg26941
and it have label [Fixed in 3.2.6]
but {cat_id} macros don't work.
On frontend I can see only macros {cat_id} - not real cat_id...
Update: it works only in file details, but it don't work in categories lists.
I found solution.
Need to add new line to /components/com_jdownloads/views/categories/tmpl/default.php
$html_cat = str_replace('{cat_id}', $cats[$i]->id, $html_cat);
Okay. I will check this.