Help with function not working from functions.php

Howdy! I need another set of eyes on this. I’m able to get this function to show custom field values when I put the code in the page.php file but when I put it in the functions.php file and call it from the page.php it not displaying the custom field values.

function custom_cont() {
global $show_cust_fld;
	$show_cust_flds = get_post_meta($post->ID, 'page_cat', false);
if ($show_cust_flds[0]=="") { ?>

<!-- If there are no custom fields, show nothing -->

<?php } else { ?>

<div class="cust_flds">
	<h3>From the Press</h3>

	<?php foreach($show_cust_flds as $show_cust_fld) {
	echo '<blockquote><p>'.$show_cust_fld.'</p></blockquote>';
	} ?>

</div>

<?php } ?>

This is how I’m calling the function within the loop from the page.php file.
<?php custom_cont(); ?>
It’s not getting the custom value to display when used in the functions.php file.
Thanks in advance.