You can create a class for the links for which you want to run _gaq.push, and then use jQuery live () to bind the click for them.
Give your links a class like gaq:
<a class="gaq" href="http:
And use jQuery live () to give all links with this class the ability to trigger the push function on click.
$('.gaq').live('click', function() {
_gaq.push(['_link', $(this).attr("href")]);
return false;
});