conditional set_value()

Hi,
CI 3x

I have a form that submits, then sends the user back to the same form and repopulates the fields if they click a checkbox to "send another after submit"...

All is working fine, the form is presented another time with the populated fields.

My issue is that I would like to empty out *some* of the fields on that second offering.

For example, what is the most elegant way of nulling out a text field, where I am currently using?:



I know I could do a condition based off that checkbox value, something like:


but wondering if there is a better built-in way in CI?

Thanks!