Multiple Tables in Single Resource?

I'm not really sure if I'm asking the right question. So here is a
little more information.

I'm attempting to put together an admin section to store posts for
several different sections of a site. I'd like to have it setup like

I could nest the post within the section and link the tables together
in the database, but can I create multiple tables, one for each

The first section might need four columns in it's table and the second
may need only one column in it's table.

If this a completely moronic way of setting this up, please let me
know that as well.

Thanks Again.