bp_nouveau_messages_adjust_nav()

function bp_nouveau_messages_adjust_nav() {
	$bp = buddypress();

	$secondary_nav_items = $bp->members->nav->get_secondary( array( 'parent_slug' => bp_get_messages_slug() ), false );

	if ( empty( $secondary_nav_items ) ) {
		return;
	}

	foreach ( $secondary_nav_items as $secondary_nav_item ) {
		if ( empty( $secondary_nav_item->slug ) ) {
			continue;
		}

		if ( 'notices' === $secondary_nav_item->slug ) {
			bp_core_remove_subnav_item( bp_get_messages_slug(), $secondary_nav_item->slug, 'members' );
		} elseif ( 'compose' === $secondary_nav_item->slug ) {
			$bp->members->nav->edit_nav( array(
				'user_has_access' => bp_is_my_profile()
			), $secondary_nav_item->slug, bp_get_messages_slug() );
		}
	}
}