disp_detail = posts-cat
This is a variation of disp = posts (List of Posts / Items) where posts are filtered on a selection of multiple categories:
Default Container and Widgets
Below is the default main Container and Widgets of this
$disp_detail that comes with b2evolution. Yours may look different depending on the particular skin in use and the widgets currently installed and how they are configured.
_posts.disp.php file in the currently used skin’s folder.