title: Create Zend form element dynamically
body: <p>I'm using Zend Framework 1.12 on a project. I having some problems with the <code>Zend_Form</code>. Some fields are generated dynamically on execution time, but the <code>Zend_Form</code> is static, a element predefined at creation. </p>
  
  <p>So, when the form is sent, the validation doesn't work because new fields were added and the sent form doesn't match the form created.</p>
  
  <p>How do that adaptation?</p>