Edit History

{if $category.id_parent != '2'}
                <li>
		              <a href="{url entity='category' id=$category.id_parent id_lang=$language.id}" title="Ver Categor&iacute;a Superior" class="img">
			              <img src="./img/imgSubCat/volver.jpg" alt="volver" />
		              </a>
		              <a href="{url entity='category' id=$category.id_parent id_lang=$language.id}" class="cat_name">Ver Categor&iacute;a Superior</a>
                </li>
                {/if}

Tested 1.7.7.0 and work.

./themes/your-theme/templates/catalog/listing/product-list.tpl

{if $category.id_parent != '2'}
                <li>
		              <a href="{url entity='category' id=$category.id_parent id_lang=$language.id}" title="Ver Categor&iacute;a Superior" class="img">
			              <img src="https://www.mercanutri.com/themes/warehouse/img/imgSubCat/volver.jpg" alt="volver" />
		              </a>
		              <a href="{url entity='category' id=$category.id_parent id_lang=$language.id}" class="cat_name">Ver Categor&iacute;a Superior</a>
                </li>
                {/if}

Tested 1.7.7.0 and work.

./themes/your-theme/templates/catalog/listing/product-list.tpl