Using template tags with data coming from a database

[eluser]Marcelo Kanzaki[/eluser]
Hello everybody,

I've used CI to build a simple CMS where i can post articles that are stored in a database (so far so simple).

People can submit new articles using a form:

- Title [input text]
- body [textarea]

What i want is to be able to use template tags within my 'body' text coming from the database.

So, i would post a new article but if i put {today} in the body, it would show a variable called $today behind the scenes.

I tried with template parser but i couldn't.

Any ideas?