How to do valid UL's in Tables?

When validating http://www.swiftglobal.com/newlayout/
 
"Error: element "ul" not allowed here; possible cause is an inline 
element containing a block-level element"
 
I understand why it is saying this, becuase I have the UL in a table 
(at least I think that's why). But my question is, how do I work around 
this? If I need UL's or OL's in tables, what is the "valid" way of 
doing it?
 
If your suggestion is to use CSS, how?
 
Thanks