In directory.xml Change:

<reference name="header">
     <block type="directory/currency" name="currency" as="currency_switcher" template="directory/currency.phtml"/>
</reference>

to:

<reference name="footer">
     <block type="directory/currency" name="currency" as="currency_switcher" template="directory/currency.phtml"/>
</reference>

EDIT:

By Default Currency should show on footer, if you look at directory.xml line 39

<reference name="footer">
            <block type="directory/currency" name="footer_currency" after="footer_store_language" template="directory/currency.phtml"/>
        </reference> 

if it is not showing in footer so you need to add:

<?php echo $this->getChildHtml('footer_currency') ?>

In directory.xml Change:

<reference name="header">
     <block type="directory/currency" name="currency" as="currency_switcher" template="directory/currency.phtml"/>
</reference>

to:

<reference name="footer">
     <block type="directory/currency" name="currency" as="currency_switcher" template="directory/currency.phtml"/>
</reference>

EDIT:

By Default Currency should show on footer, if you look at directory.xml line 39

<reference name="footer">
            <block type="directory/currency" name="footer_currency" after="footer_store_language" template="directory/currency.phtml"/>
        </reference> 

if it is not showing in footer so you need to add:

<?php echo $this->getChildHtml('footer_currency') ?>

Local.xml

<reference name="footer">
<block type="directory/currency" name="footer-currency" template="directory/currency.phtml"/>
</reference>

In directory.xml Change:

<reference name="header">
     <block type="directory/currency" name="currency" as="currency_switcher" template="directory/currency.phtml"/>
</reference>

to:

<reference name="footer">
     <block type="directory/currency" name="currency" as="currency_switcher" template="directory/currency.phtml"/>
</reference>

In directory.xml Change:

<reference name="header">
     <block type="directory/currency" name="currency" as="currency_switcher" template="directory/currency.phtml"/>
</reference>

to:

<reference name="footer">
     <block type="directory/currency" name="currency" as="currency_switcher" template="directory/currency.phtml"/>
</reference>

EDIT:

By Default Currency should show on footer, if you look at directory.xml line 39

<reference name="footer">
            <block type="directory/currency" name="footer_currency" after="footer_store_language" template="directory/currency.phtml"/>
        </reference> 

if it is not showing in footer so you need to add:

<?php echo $this->getChildHtml('footer_currency') ?>