What is the simplest, most default way of adding labels to the input fields of a Zend_Form?

Playing around with Zend_Form, I tend to subclass my forms and use the fluent interface:
But I am very new to ZF, so I don't know, if this is the simplest, most default way to add labels.
Maybe there is no such 'most default way' ?
/friedhelm

If you have your controller setup, you can call this directly in your view script

<?=$this->formLabel('xyz', 'ABC') ?>

I did it like mentioned...
$inputfield->setLabel('whatever');

now the problem is that in the html i get this

<label class='ISdan IStxt required'...

I only set it to be IStxt.
The ISdan and required it got from the inputfield itself. why is that? i only need it to be class='IStxt' or it wont show right.

help please