Hi CarlosPinedo,
You can only "update" apps by resubmitting them to Apple/Google, meaning, the apps stay the same unless you manually update them.
What you can do though, is have an app that loads content from a URL that is updated by CMSB. So for example, if you have a page called example.com/mobile/news.php or news.rss.php, you could load that into the app.
You might want to take a look at: http://phonegap.com/ Note that there's a lot of new technologies to learn to make that work.
Hope that helps!
Dave Edis - Senior Developer
interactivetools.com