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Hi, anyone have any idea how to hidden whatsapp content when received a notification without content just showing sender name. No matter is it lock screen or unlock screen.
Sure, I sent an email to them, waiting their reply. 
My assumption is that you want to enable 'hide sensitive content' meaning when your phone is locked you want to receive notification from whatsup without showing the content, am i right? You have to set a security level (PIN, password, or pattern), otherwise this option is not available. And after that you will have the functionality (at leats for watsup)
http://support.sonymobile.com/global-en/xperiaz3compact/userguide/notifications/