How to change "UserCP" to "User Info"

[LorinPotter]

Yes, I was talking about the button on the navbar.

What happens if I change $vbphrase[user_cp] to [user_info] on the navbar of a style, the "UserCP" simple disappears form the navbar.
If I change it to [User Info], it causes a syntax error and the page is blank.

Seems to me that's simply saying to echo a variable that isn't actually defined. Doesn't this have to be defined somewhere before using? Also, would not defining the variable to be 'User Info' screw it up everywhere else it's used.

Now, bear in mind that I've quite unfamiliar with website software and PHP.