BuddyPress.org

actually, it is quite hard for me to answer. I’m referring to widgets (categories, tags) that are native for WP+BP and which I want to use on my front page, not sidebar.
ok, I could ask in other way:

is it possible to use two shortcodes for categories dropdown and tags dropdown (for regular BP posts), which I could insert in my index.php?

I mean some functions call, so that I don’t have to install additional plugins.

thanks.