Teste.php

<?php
 
class Application_Form_Teste extends Zend_Form
{
    public function init()
    {
        
        $this->setName('fornecedor');
        $this->setAttrib('class', 'form-horizontal');
        
        $this->addElementPrefixPath(
            'Validate', APPLICATION_PATH . '/forms/validate/', 'validate'
        );
    }
    
        $cnpj = new Zend_Form_Element_Text('cnpj');
        $cnpj->setLabel('CNPJ')
                ->setRequired(true)
                ->addFilter('StripTags')
                ->addFilter('StringTrim')
                ->addValidator($notEmpty, true)
                ->addValidator('Cnpj')
                ->setAttrib('class', 'form-control cnpj')
                ->setAttrib('placeholder', 'CNPJ');
      
        $uf = new Zend_Form_Element_Text('uf');
        $uf->setLabel('Estado')
                ->setRequired(true)
                ->addFilter('StripTags')
                ->addFilter('StringTrim')
                ->addValidator($notEmpty, true)
                ->addValidator('Estado')
                ->setAttrib('class', 'form-control text-uppercase')
                ->setAttrib('v-model', 'fornecedor.uf')
//                ->setAttrib('v-on:keyup', 'buscaSigla')
                ->setAttrib('placeholder', 'ESTADO')
                ->setAttrib('maxLength', 2);          
                
}