This is not an example of cloaking, and Google can easily fetch the
content.
As long as there is nothing else that is stopping the text from being
viewed by Google, it should be weighted the same as copy, which
isn’t in tabs.
Want more clarification on this?
Then check out Roger Montti’s post that puts this myth to bed.
Verdict: SEO myth
HOW TO SPOT SEO MYTHS: 20 COMMON SEO MYTHS, DEBUNKED