Alexandr Rudomanov

{$count_products = $products|count}
{$row_count = ($count_products/4)|ceil}
<ul class="products">
	{$i=0}
	{foreach $products as $product}
		{$i=$i+1}
		{if $product@first || $i==1}<li class="product">{/if}
			<div class="product_block">
				тут код для товара
			</div>
		{if $i==$row_count || $product@last}</li>{$i=0}{/if}
	{/foreach}
</ul>

{$count_products = $products|count}
{$row_count = ($count_products/4)|floor}
{$big_columns = $count_products%4}
<ul class="products">
	{$i=0}	{$i2=1}
	{foreach $products as $k =>$product}
		{$i=$i+1}
		{if $i==1}<li class="product">{/if}
			<div class="product_block">
				[товар, колонка {$i2}, позиция  {$i}]
			</div>
		{if ($i==$row_count && $i2>$big_columns ) || $i>$row_count || $product@last}</li>{$i=0}{$i2++}{/if}
	{/foreach}
</ul>