Chained form items

Yii 1.1
1

I want to create a multiple chained/choise form with a single model.

I mean the user has 5 options from a dropdownlist.

For an example if user selects option 2 from 5 options, I want to display a different dropdown which by default is hidden which also contains a different dropdown with other options.
To say it differently, I want the user according to selection, display different options to choose from until the final save

So the question is:

Is there a Yii way to check if previous form item has value then accordingly display other dropdownlist or form item which is hidden?
and so on?

2

Yii contains what you submit. If current submission have information about it, your controller will have it. Unless you put forth an example it will all be abtract

3

Thank you for your answer.

All I needed was dependent dropdowns. Maybe it will help someone and there are extended examples