Line Break in a dropdown

In the old version of siebel it was possible to use html tags inside label controls and calculated fields. We could set the property of the control to don't encode data and it would work as expected.

We have requirement where our calculated field is showing combination multiple values and we would like to introduce a line break between these values.  Here is how we want it to appear

As Is:

Apt Number : 1234; House Number : 1234: Street : 1234

Above is concatenation of three fields seperated by semicolon.

To Be

Apt Numeber: 1234

House Number: 1234

Street: 1234

Normal tricks Field Format is not working we see <br/> tag in the field. Is is possible to do this in Open UI ???