đoạn code để tạo menu bên trái dạng cột như này :
<ul class="product-categories"><li class="vc_tta-tab vc_active"><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ chống nước Duratek" width="16" height="16" /> <strong><a href="http://vuacuago.com/cua-go-duratek/"> Cửa Gỗ DURATEK</a></strong></li><ul class="chidren"><li><a href="http://vuacuago.com/cua-go-duratek/cua-go-gravo/"><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ chống nước tuyệt đối duratek gravo" width="16" height="16" /><strong>DURATEK Gravo</strong></a></li><li><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ chống nước tuyệt đối duratek flatta" width="16" height="16" /><strong><a href="http://vuacuago.com/cua-go-duratek/cua-go-flatta/">DURATEK Flatta</a></strong></li><li><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ chống nước tuyệt đối duratek Lineart" width="16" height="16" /><strong><a href="http://vuacuago.com/cua-go-duratek/cua-go-line-art/">DURATEK Line Art</a></strong></li><li><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ chống nước tuyệt đối duratek colorlife" width="16" height="16" /><strong><a href="http://vuacuago.com/cua-go-duratek/cua-go-color-life/">DURATEK Color life</a></strong></li></ul><li><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ tự nhiên Solitek" width="16" height="16" /><strong><a href="http://vuacuago.com/cua-go-solitek/">Cửa Gỗ SOLITEK</a></strong><ul class="children"><li><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ tự nhiên Solitek classic" width="16" height="16" /><strong><a href="http://vuacuago.com/cua-go-solitek/cua-go-solitek-classic/">SOLITEK Classic</a></strong></li><li><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ tự nhiên Solitek duluxe" width="16" height="16" /><strong><a href="http://vuacuago.com/cua-go-solitek/cua-go-solitek-deluxe/">SOLITEK Deluxe</a></strong></li><li><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="cửa gỗ tự nhiên Solitek full white" width="16" height="16" /><strong><a href="http://vuacuago.com/cua-go-solitek/cua-go-solitek-full-white/">SOLITEK Full White</a></strong></li></ul></li><li class="cat-item cat-item-50"><img src="http://vuacuago.com/wp-content/uploads/2016/06/logo-huge-mini.png" alt="Vietnam flag" width="16" height="16" /><strong><a href="http://vuacuago.com/product-category/cua-go-metatek/">Cửa Gỗ METATEK</a></strong></li></ul>