Replace your td tag with this one. Chang some of the attributes and your set.
PHP Code:
<td bgcolor="red" onMouseOver="this.style.backgroundColor='blue'; this.style.cursor='hand';" onMouseOut="this.style.backgroundColor='red';" onClick="window.location.href='http://www.domain.com'">
If you have tons of content, you might wanna use a php var and styles.
Whoa, hey I posted this html as is then previewed it. html works on the board. Try it, Copy the code > reply to this post then paste and preview. You see what I'm talking about.