BuddyPress.org

would you put the code as it should be because i dont get it then ?

Mine is looking like this now ?

<?php
// hacks and mods will go here
?>
<?php function abc() {
$user = get_userdata( bbp_get_reply_author_id() );
        if ( !empty( $user->user_nicename ) ) {
                $user_nicename = $user->user_nicename;
                echo '@'.$user_nicename;
        }
}
add_filter( 'bbp_theme_after_reply_author_details', 'abc' )?>