In my experience changing the attributes using an id selector will not update the actual element.
However using the class and other selectors will work. So
$('#myLink_33').attr('href','http://www.google.com')
will change the value of the href attribute only when queried, but when the link is actually selected, it will default to the href value it possessed when the page loaded.
However assuming the anchor had a class="myLink_33", the attr change,
$('.myLink_33').attr('href','http://www.google.com')
would work as expected.
