$client = new soapClient("ttp://ws.giap.com.br/WSNFSECampina/wsintegration?wsdl", $options = array(
            'trace'=>1,
            'exceptions'=> 0,
            'encoding' => 'UTF-8',
            'soapaction' => '5')
        );

    $ns = 'http://v5.ws.vads.lyra.com/Header/';
    $token = "12345678";

    $headerToken = new SOAPHeader($ns, 'token', $token);

    $headers = array(
        $headerToken
    );

$client->__setSoapHeaders($headers);