This Disp is used to display a hierarchical view of categories and sub-categories of a collection.
This, of course, only applies as long as the particular skin you are using doesn’t completely override the behavior of b2evolution’s default disp=catdir handler.
Default Container and Widgets
By default, this disp does not display a specific widget container. Yours may look different depending on the particular skin in use, the widgets currently installed and how they are configured.
Tip: We can fully customize how this disp will look by creating or replacing the
_catdir.disp.php file in the currently used skin’s folder.