Ho risolto in questo modo:
default.php riga 107 circa
prima: <?php echo $this->formatPrice( floatval($row->price) , JText::_('Consult us') ) ?>
dopo: <?php if ($row->price != 0) { echo number_format($row->price,2, ',', '.'); echo " €"; } else { echo "Consult us"; } ?>
default_item.php riga 86 circa
prima: <?php echo $this->formatPrice( floatval($this->row->price) , JText::_('Consult us') ) ?>
dopo: <?php if ($this->row->price != 0) { echo number_format($this->row->price,2, ',', '.'); echo " €"; } else { echo "Consult us"; } ?>
Ciao