BuddyPress.org

@naijaping what theme are you using and how are nav items generated in your theme? If you’re using child theme of bp-default, there are CSS classes automatically which you can target for styling currently selected items.

For BP 1.2.9 there’s .selected and .current_page_item classes
`ul#nav li.selected a, ul#nav li.current_page_item a {
background: #f5f5f5;
color: #555;
}`

For upcoming BP 1.5 bp-default using wp_nav_menu, there’s .selected, .current-menu-item, .current_page_item, and even current_page_ancestor
`#nav li.selected a,
#nav > li.current-menu-item a,
#nav > li.current_page_item a,
#nav > li.current_page_ancestor a {
background: none repeat scroll 0 0 #F5F5F5;
color: #4D4D4D;
}`