WordPress Short-Code in Categories showing!

I have a website that uses a plugin to create PDF categories. But the short codes are showing. How would I go about to eliminate them (To stop showing in the PDF? I have use in function.php

[code]

add_filter('the_content', 'strip_shortcodes');

Also tried:

add_filter('the_exerpt', 'strip_shortcodes');

[/code]

But it did not work. Any ideas?

See: http://negevtours.com/israel-a-life-changing-expierence/ see: Category as PDF:

Thanks,