In Yii main application is actually a module (core one) so each module configuration actually shares nearly everything what you can put to main application’s configuration file.
Thus, you can configure any Yii module, just as you would do with your main application. The only difference is that you don’t use external configuration file, but
CModule::configure() function instead.
Here is an example of such in-module configuration
public function init()
Above example also shows how to preload Yii Bootstrap extension inside module and thus make it available in that module only. This causes and Bootstrap’s styles does not affects main application look.
Keep in mind, that with
configure() function you can only change settings of uninitiated components. For those, that are already initiated, you should use a direct approach. I.e.:
Yii::app()->bootstrap->responsiveCss = false;
Refer to this Yii forum topic for more details.
to alter main application configuration on-the-fly.
UPDATE: I used solution shown in this article, because I haven’t got any better ready, when writing this post. Actually, this particular thing (loading an extension only for module, not for main application) can be achieved much easier way. Read this post for more details.