Put this in your theme

accordion.js

/**
 * @file
 * Use accordions in node body.
 */

(function ($) {

Drupal.behaviors.undpaulAccordion = {
  attach: function(context) {
    $('#accordion').accordion({
      active: false,
      autoHeight: false,
      collapsible: true,
      heightStyle: 'content'
    });
  }
};

})(jQuery);