public function formatIdPCertMulti()
    {
        if (isset($this->_idp['x509certMulti'])) {
            if (isset($this->_idp['x509certMulti']['signing'])) {
                foreach ($this->_idp['x509certMulti']['signing'] as $i => $cert) {
                    $this->_idp['x509certMulti']['signing'][$i] = OneLogin_Saml2_Utils::formatCert($cert);
                }
            }
            if (isset($this->_idp['x509certMulti']['encryption'])) {
                foreach ($this->_idp['x509certMulti']['encryption'] as $i => $cert) {
                    $this->_idp['x509certMulti']['encryption'][$i] = OneLogin_Saml2_Utils::formatCert($cert);
                }
            }
        }
    }