jQuery Accordion WP - functions.php

if(!is_admin()){
    wp_deregister_script('jquery');
    wp_register_script('jquery', ('https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js'), false, '1.6.4');
    wp_enqueue_script('jquery');
    wp_deregister_script('jquery-ui');
    wp_register_script('jquery-ui', ('https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js'), false, '1.8.16');
    wp_enqueue_script('jquery-ui');
}