Simply bind to the "select_node.jstree" event and do what you need
with the link:
$("#tree")
.jstree(/* your config here */)
.bind("select_node.jstree", function (e, data) {
var href = data.rslt.obj.children("a").attr("href"); // this is
the link
// you can follow it:
document.location.href = href;
// or load it somewhere
$("#the_div").load(href);
})
If you go with changing the document location, you will need to
reselect it once the page load is done ... but be careful not to get
in a loop - this is discussed in the FAQ on
jstree.com ... and here in
the groups.
Kindest regards,
ivan