Assigning sequence number inside LI on sortable list

Assigning sequence number inside LI on sortable list

I am working on a draggable / sortable activity scheduler and am trying to figure out how to assign sequence numbers to hidden inputs within each <li>. I have two <ul>'s one with the activity choices (#addOns) and one where activities can be dropped and sorted (#myItin).  I have found out how to renumber the <li>'s each time they are sorted, but am trying to figure out how to use that value and append it to a hidden form input.

My current script:
  1.   $('#addOns > li').draggable({helper:'clone', opacity: 0.5, connectToSortable:'#myItin'});

      $('.dlt').live("click", function(event) {
        event.preventDefault();
        $(this).parent().remove();
        $('#myItin').sortable('refresh');
        });

      $('#myItin').sortable({

        // recounting upon sort

        stop: function(event, ui) {
        $('li > span.seq').each(function() {
           var $this = $(this);
           $this.text($this.parent('li').prevAll().length + 1);
           }); 
        }
        });


















Within each <li> I have hidden inputs:

    <input type="hidden" name="activity" value="raft01">

I would like to append the sequence number to the name="activity" so that I end up with name="activity1", name="activity2", etc.  There are actually two hidden fields per <li> one for activity and one for number of days, so I need to append the sequence value to two separate input names.

Any suggestions from the gurus

Thanks in advance.