Replace:
<a href="patch.html"> Police Patches <span>My police patch collection.</span></a>
With:
<a href="patch.html"> Police Patches <span><strong>My police patch collection.</strong></span></a>
And do the same (adding surrounding <strong>) to the other 'popup' text.
Then in the CSS within
div#links a:hover span change:
left: 248px;
to:
left: 50%;
And finally add these new lines to the end of the CSS:
div#links a:hover span strong {
margin-left: -200px;
}
Just adjust that -200px if it doesn't align quite right.