$filter
apply_filters( $filter, '<a href="' . $link . '">' . $text . '</a>', (int)$total_items )
API Hooks: BuddyPress:: File: bp-friendsbp-friends-activity-php (3)
friends_register_activity_actions
do_action( 'friends_register_activity_actions' )
friends_format_notifications
do_action( 'friends_format_notifications', $action, $item_id, $secondary_item_id, $total_items, $return )