Open /includes/page_header.php
find "lang_control_panel" => $lang['control_panel'],
add after "lang_user_panel" => $lang['user_control_panel'],
Open /lang/english/main.php
add at the end of file before ?>
$lang['user_control_panel'] = "User Profile";
Open /templates/YOURTEMPLATE/user_logininfo.html
change {lang_control_panel}
to{lang_user_panel}