Working from your jsFiddle example:
The jsFiddle was fine, but you were missing semi-colons at the end of the event.preventDefault() statements.
This works: Revised jsFiddle
jQuery(document).ready(function() {
jQuery(".rec1").click(function(event) {
event.preventDefault();
jQuery('#rec-box').html(jQuery(this).next().html());
});
jQuery(".rec2").click(function(event) {
event.preventDefault();
jQuery('#rec-box2').html(jQuery(this).next().html());
});
});