magento: get same url in other store views

<?php

include 'app/Mage.php';
Mage::app();

$langStores = array();
$stores = Mage::app()->getStores();
$currentUrl = Mage::helper('core/url')->getCurrentUrl();
$currentStore = Mage::app()->getStore();
$urlType = Mage_Core_Model_Store::URL_TYPE_LINK;
$xmlLocalPath = Mage_Core_Model_Locale::XML_PATH_DEFAULT_LOCALE;
$isCurrentlySecure = $currentStore->isCurrentlySecure();
$currentBaseUrl = $currentStore->getBaseUrl($urlType, $isCurrentlySecure);

foreach ($stores as $store) {
    if ($store->getIsActive() && $store->getId() != $currentStore->getId()) {
        $lang = Mage::getStoreConfig($xmlLocalPath, $store->getId());
        $lang = strtolower(str_replace("_", '-', $lang));
        $langStores[$lang] = $store->getBaseUrl($urlType, $isCurrentlySecure);
    }
}

$currentUri = str_replace($currentBaseUrl, '', $currentUrl);

foreach ($langStores as $lang => $url) {
    echo '<link rel="alternate" hreflang="' . $lang . '" href="' . $url . $currentUri . '" />' . PHP_EOL;
}