I’ve just realized that I’ve pasted the same code in my previous reply. Even just in case if may be useful to someone else I’m fixing this error.
Original code:
<div class="product-navigation clearfix">
<h4 class="meta-title"><span><?php _e('Scegli altri prodotti', ETHEME_DOMAIN); ?></span></h4>
<div class="product-arrows pull-right">
<?php previous_post_link_product(); ?>
<?php next_post_link_product(); ?>
</div>
</div>
Modified code for navigating products in the same order of product page:
<div class="product-navigation clearfix">
<h4 class="meta-title"><span><?php _e('Scegli altri prodotti', ETHEME_DOMAIN); ?></span></h4>
<div class="product-arrows pull-right">
<?php next_post_link('%link', '<div class="prev-product"></div>', FALSE); ?> <?php previous_post_link('%link', '<div class="next-product"></div>', FALSE); ?>
</div>
</div>