[Typo3] Typoscript: yet another conditions question

[Paolo Nugnes]

Hi all,

i created my personal extension and, now that it works, i have to configure 
the FE output by typoscipt.

in the setup i set those three custom fields:

plugin.tx_myext_p1 {
    label
    content1.required=1
    content1.wrap = | <br />
    content2.required=1
    content2.wrap = | <br />
}

The general question is:
how do i make hidden the 'label' field if 'content1' and 'content2' are 
empty (so they are not shown)?

Could it only be done trough php?

Thanks for help
Paolo Nugnes