Jekyll loop pages by parent directory - jekyll

Question

My Jekyll site is comprised of pages in folders. Like this:
modules
- week 1
-- topic 1
-- topic 2
-- topic 3
- week 2
-- topic 1
- week 3
-- topic 1
Here's a screenshot of my Sublime folder view: http://glui.me/?i=884mtx2vcyv7fjx/2014-08-26_at_11.26_AM.png/
I can just do a simple {% for page in site.pages %} to output a flat list of all the pages in the site, but I want to maintain that folder structure.
Any ideas for how I might output a list that mirrors the directory structure I have?
Thanks!

Answer 1

This pages scheme
--modules
|
--schedule
| |--schedule-01.html
| |--schedule-02.html
|
--week01
| |--topic-01.html
| |--topic-02.html
| |--topic-11.html
|
--week02
| |--topic-01.html
| |--topic-02.html
|
--week11
| |--topic-01.html
| |--topic-02.html
|
|...
can be nicely sorted and presented in a menu
Example page modules/week01/topic-01.html
---
title: Week 1 - Topic 01
layout: page or any custome module layout
menu: modules
---
Topic 01 content
And finally the modules.html page with his menu
<h2>Modules list</h2>
{% assign sorted = site.pages | sort: "url" %}
<ul>
{% for p in sorted %}
{% if p.menu == "modules" %}
<li>{{ p.title }}</li>
{% endif %}
{% endfor %}
</ul>