list categories along with their post

Hello,

I’m looking to
– show the categories a post belongs to,
– show those categories in a list
– order those categories by ID
– show only the categories with a certain parent

It would be soooo great to make this a shortcode…

This is what I found

<?php
foreach((get_the_category()) as $childcat) {
if (cat_is_ancestor_of(16, $childcat)) {
echo '<li class="<?php echo $orderby=ID;?>"><a href="'.get_category_link($childcat->cat_ID).'">';echo $childcat->cat_name . '</a></li>';
}}
?>

This code does :
– show the categories a post belongs to
– makes a list
– shows only categories in parent ID (in this case 16)

Still looking for some help to :
– order those categories by ID
– turn this into a shortcode

Any suggestions are very welcome!

Kind regards