not working

/* TABS */
jQuery(document).ready(function($){

$('ul.tabs').each(function(){
// For each set of tabs, we want to keep track of
// which tab is active and it's associated content
var $active, $content, $links = $(this).find('a');

// Use the first link as the initial active tab
$active = $links.first().addClass('active');
$content = $($active.attr('href'));

// Hide the remaining content
$links.not(':first').each(function () {
$($(this).attr('href')).hide();
});

// Bind the click event handler
$(this).on('click', 'a', function(e){
// Make the old tab inactive.
$active.removeClass('active');
$content.hide();

// Update the variables with the new link and content
$active = $(this);
$content = $($(this).attr('href'));

// Make the tab active.
$active.addClass('active');
$content.show();

// Prevent the anchor's default click action
e.preventDefault();
});
});
});