Simple tabs.

tabs.js

$(document).ready(
  /**
   *  Tabs
   */
  $('.js-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');

    // If the location.hash matches one of the links, use that as the active tab.
    // If no match is found, use the first link as the initial active tab.
    $active = $($links.filter('[href="'+location.hash+'"]')[0] || $links[0]);
    $active.addClass('is-active');
    $content = $($active.attr('href'));
    $content.addClass('is-active');

    // Hide the remaining content
    $links.not($active).each(function () {
        $($(this).attr('href')).removeClass('is-active');
    });

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

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

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

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