Token support in item title of the custom text provider

I would like to add a link to the taskbar that would use the "realname" value from the module (http://drupal.org/project/realname) that links to the user profile page using PHP code or token values. Example:

<a href="user/[current-user:uid]">[realname]</a>

I also tried using the php code below but it doesn't seem supported in the 'custom' section of taskbar?

<?php
global $user;

print theme('username',  $user);
?>

I installed the 'menu token' module for this and still cannot get support for the tokens in taskbar. Also, I have tried to do this via PHP using the "add custom" function in the taskbar, but also did not find a way to accomplish this.

<?php global $user; print ($block->module == 'user' && $block->subject == $user->name) ? theme('username', $user) : $block->subject ?>

I am using this code (http://drupal.org/node/353253) to change the title of the user navigation block to the 'realname' of the user, but cannot get this to work in taskbar either by adding the block.

Any help or suggestions to solve this problem via code would be appreciated. Thanks.