WP Nav Menus – Please Help

I hate to sound so dramatic, but if someone would just tell me this cannot be done, I will shut-up about it ??

I have the exec PHP plug-in, and am using this code on a page to show a custom menu that I have:

wp_nav_menu(array('menu' => '144')); ?>

This link: Function Reference/WP Nav Menu says that text can be shown before the a tag (link) in a WP custom menu by inserting this into the array above:

before => 'static text'

That works fine, BUT the exact same text showing up before each link in my menu is not what I need.

I would like the date that I created the link to show up before the link…not the same exact text each time. Is that possible?

Dates can be shown when posts are created and when pages are created, so I feel that there is a way to display the date that the link was created.

If it can be done, then I will go from there. I understand that I may have to pay someone to write this code if it is tedious, but I just want to know if it is even possible.

Any Ideas?

Thanks very much guys,
Chris