KeineLust said:the format of this wiki is very good
is of the other game
http://es.terraria.wikia.com/wiki/Wiki_Terraria
Are you referring to the navigational bars and what not? That uses the wikia web-hosting service, which is different from the wiki service PWO's wiki is using - the latter is financially managed by Bluerise, where as the latter (wikia) is free-to-host and funded by advertisements. Therefore, much of the format features used on the wikia website you linked (navigational features, for example) are bound by the services provided by its operator in Wikia. Inc I believe; these features are differentiated with the PWO wiki, which uses the wiki content management system itself I believe.
Therefore, I don't believe it's doable to replicate the format used for the wikia website you linked (assuming you're referring to the navigational bars), but I'm not fully positive as I'm not wholly familiar with administrative management for wiki's.