Thanks to the previous commenters I found all the following worked for me:
Either adding an onclick stub to the element
onclick="void(0);"
or user a cursor pointer style
style="cursor:pointer;"
or as in my existing code my jquery code needed tap added
$(document).on('click tap','.ciAddLike',function(event)
{
alert('like added!'); // stopped working in ios safari until tap added
});
I am adding a cross-reference back to the Apple Docs for those interested. See Apple Docs:Making Events Clickable
(I'm not sure exactly when my hybrid app stopped processing clicks but I seem to remember they worked iOS 7 and earlier.)