jQuery(document).ready(function($) {
  $('#category-accordion').accordion(
    {
      header: 'h3',
      autoHeight: false,
      
      //...the following two options ("collapsible" and "active" are
      //   set to make all sections collapsed when the page first is
      //   set up...
      collapsible: true,
      active: false
    }
  );
  
});