Showing text to only members of a certain member group?

[ArcaneCharlie]

Hey - I'd like to change the text on an empty forum that reads 'No posts here yet' to show 'You must be logged in to view this' for all users who are Guests.

Would it be possible with something like this that I found on StackOverflow:

<if test="!$this->member->getProperty('member_id')">

Or is this redundant, seeing as it was posted in 2011?

Thanks in advance

[Joel R]

I think the easiest and best approach is to use the Quick Translating tools since, and correct me if I'm wrong, you want to change the message everywhere it appears? 

Search the IPS Guides for Quick Translating.