hi wont to change Currency Slot to dropdown option exampale

public_html/catalog/view/theme/pavilion/template/common
<?php // Currency Slot ------------------------------------------------ ?>
        <?php $tbData->slotStart('common/header.currency'); ?>
        <?php echo $currency; ?>
        <?php $tbData->slotStop(); ?>

i am replace code

<?php // Currency Slot ------------------------------------------------ ?>
<p>
<li>select your city?
<select id="foo">
    <option value="">Pick a city</option>
    <option value="http://www.google.com">x</option>
    <option value="http://www.yahoo.com">y</option>
</select></li>

<script>
    document.getElementById("foo").onchange = function() {
        if (this.selectedIndex!==0) {
            window.location.href = this.value;
        }
    };
</script>

</p>

if i change the code option are go up site of Welcome visitor you can login or create an account.how to fix
dropdown option , i wont only change in header side currency to dropdown option
plz help me out and give me proper code