jquery accordion accepts an option called header that allows you to provide a selector to designate the items you want to act as the accordion headers.
$('li.categories > ul').accordion({ header: 'li.categories > ul > li' });
jquery accordion accepts an option called header that allows you to provide a selector to designate the items you want to act as the accordion headers.
$('li.categories > ul').accordion({ header: 'li.categories > ul > li' });