{* $show_customer_info may have been passed from the PHP
	application, to regulate whether or not this section shows *}
	{section name=customer loop=$custid show=$show_customer_info}
	{$smarty.section.customer.rownum} id: {$custid[customer]}<br>
	{/section}

	{if $smarty.section.customer.show}
	the section was shown.
	{else}
	the section was not shown.
	{/if}


	OUTPUT:

	1 id: 1000<br>
	2 id: 1001<br>
	3 id: 1002<br>

	the section was shown.