Jquery Ui Tabs not working

Why are you using hosted versions of jQuery and jQuery UI when WordPress has local versions?

To use tabs you need to add the tabs register code in a js file or in your footer (via the wp_footer filter) in your functions.php

e.g.

function wpse203799_footerscript(){
?>
<script type="text/javascript">
  $(function() {
    $( "#tabs" ).tabs();
  });
</script>
<?php
add_action( 'wp_footer', 'wpse203799_footerscript', '30' );