Display all sub categories and posts within?

Does this make sense? Is it too easy of a question? Or is it not worded clear enough?

Try this

<?php single_cat_title(); ?>
<?php $catId = get_query_var( 'cat' ); ?>
<?php wp_list_cats( 'child_of=' . $catId ); ?>

It doesn’t display the Posts in the category, though

It was able to display that whole tree of information for me, thank you…. I am still looking for a way to have that last level child display post_titles…
I can see that it would be hard…

maybe it is a matter of changing this line to include a call for post titles?
<?php wp_list_cats( ‘child_of=’ . $catId ); ?>

Can someone describe for me, what the PHP is actually dong here?

<?php $catId = get_query_var( ‘cat’ ); ?>
<?php wp_list_cats( ‘child_of=’ . $catId ); ?>

I am assuming that it is:

getting the current category ID, and making a search for all of the categories within .
Then, it is listing the categories, including the children of those categories, by ID.

(assuming that my translation is correct)
is it possible to have something that says –

Now with each list of child categories that are sorted by ID, Show all available posts_titles.

I am digging around, and this is basically what I am searching for. So if i am way off base here about what is possible with PHP let me know.

Nothing is impossible; it’s just a matter whether I want to bother with it. You just need to modify WP’s list_cats to grab the corresponding Posts as it traverses the categories.

yes, i am sure that it is not impossible, nor am I asking someone to do it for me.
Thank you. I will continue to look into modifying the list_cats.