$(document).ready(function() {
  $('#block-menu-primary-links ul.menu').append(
    '<li class="leaf"><a href="#" class="chat">Chat</a></li>'
  ).append(
    '<li class="leaf"><span class="call">877-664-0221</span></li>'
  );

  $('#block-menu-primary-links a.chat').click(function() {
    olark('api.box.expand');
  });

});
;