pou7777

See this:
http://stackoverflow.com/questions/20411807/wp-query-woocommerce-products-that-belong-in-distinct-multiple-categories-only-t

Take a look at:

http://ww.wp.xz.cn/support/topic/url-rewriting-hack-for-custom-post-types?replies=3

http://ww.wp.xz.cn/support/topic/adding-custom-url-rewrite-to-wordpress?replies=3

Instead of having this in your header.php :
<?php $my_query = new WP_Query('category_name=featured&showposts=10');?>

you must build a query with the ID instead of category_name and it should look like this:

<?php
$args = array(
      	'showposts' => 10,
      	'post__in'  => array(1,3,66,321)
      );
$my_query = new WP_Query($args); ?>

where 1,3,66,321 are posts ID.