Code:
"<div style='float:left;color:black;'>{$lang['gl_msg_welcome']}, <a href='userdetails.php?id={$CURUSER['id']}'>{$CURUSER['username']}</a>".
change to
Code:
"<div style='float:left;color:black;'>{$lang['gl_msg_welcome']}, <a href='userdetails.php?id={$CURUSER['id']}'>{$CURUSER['username']}</a> [ {$CURUSER['class']} ]".