В Prestashop 1.6 в категории, по умолчанию, выводится 3 товара в ряд (сетка), боковые колонки отключены за ненадобностью. Надо же, что-бы было 4 или 5 товаров в ряд.
Меняла разметку в product_list.tpl, вроде получилось, но оказалось, что при переходе "сетка / список" все сбивается.
{if isset($products) && $products}
{*define number of products per line in other page for desktop*}
{if $page_name !='index' && $page_name !='product'}
{assign var='nbItemsPerLine' value=4}
{assign var='nbItemsPerLineTablet' value=2}
{assign var='nbItemsPerLineMobile' value=3}
{else}
{assign var='nbItemsPerLine' value=4}
{assign var='nbItemsPerLineTablet' value=3}
{assign var='nbItemsPerLineMobile' value=2}
{/if}
{*define numbers of product per line in other page for tablet*}
{assign var='nbLi' value=$products|@count}
{math equation="nbLi/nbItemsPerLine" nbLi=$nbLi nbItemsPerLine=$nbItemsPerLine assign=nbLines}
{math equation="nbLi/nbItemsPerLineTablet" nbLi=$nbLi nbItemsPerLineTablet=$nbItemsPerLineTablet assign=nbLinesTablet}
<!-- Products list -->
<ul{if isset($id) && $id} id="{$id}"{/if} class="product_list grid row{if isset($class) && $class} {$class}{/if}">
{foreach from=$products item=product name=products}
{math equation="(total%perLine)" total=$smarty.foreach.products.total perLine=$nbItemsPerLine assign=totModulo}
{math equation="(total%perLineT)" total=$smarty.foreach.products.total perLineT=$nbItemsPerLineTablet assign=totModuloTablet}
{math equation="(total%perLineT)" total=$smarty.foreach.products.total perLineT=$nbItemsPerLineMobile assign=totModuloMobile}
{if $totModulo == 0}{assign var='totModulo' value=$nbItemsPerLine}{/if}
{if $totModuloTablet == 0}{assign var='totModuloTablet' value=$nbItemsPerLineTablet}{/if}
{if $totModuloMobile == 0}{assign var='totModuloMobile' value=$nbItemsPerLineMobile}{/if}
<li class="ajax_block_product{if $page_name == 'index'} col-xs-12 col-sm-4 col-md-3{else} col-xs-12 col-sm-6 col-md-3{/if}{if $page_name == 'product'} col-xs-12 col-sm-4 col-md-4 {else} col-xs-12 col-sm-6 col-md-3{/if}{if $smarty.foreach.products.iteration%$nbItemsPerLine == 0} last-in-line{elseif $smarty.foreach.products.iteration%$nbItemsPerLine == 1} first-in-line{/if}{if $smarty.foreach.products.iteration > ($smarty.foreach.products.total - $totModulo)} last-line{/if}{if $smarty.foreach.products.iteration%$nbItemsPerLineTablet == 0} last-item-of-tablet-line{elseif $smarty.foreach.products.iteration%$nbItemsPerLineTablet == 1} first-item-of-tablet-line{/if}{if $smarty.foreach.products.iteration%$nbItemsPerLineMobile == 0} last-item-of-mobile-line{elseif $smarty.foreach.products.iteration%$nbItemsPerLineMobile == 1} first-item-of-mobile-line{/if}{if $smarty.foreach.products.iteration > ($smarty.foreach.products.total - $totModuloMobile)} last-mobile-line{/if}">
<div class="product-container" itemscope itemtype="https://schema.org/Product">
Надеюсь на помощь. Спасибо.