It didn't happed specifically with bread, as other comment exposed, but it happened with other products, specially in bars, cafés, and restaurants.
On the other hand, inflation affected different products in different ways. I remember how in January 1st 2002 a small bag of Ruffles Jamón costed €0.15 in a kiosk and now it's around €0.50 (or even more) in same places (and now contains less product and more air), and I doubt any other product that are nearly 300% percent inflation since 2002 (outside homes sadly)
1 euro = 166 PTS, 6 euro ~ 1000 PTS, the basic banknote.
Guess what happened. Exactly. Bread costing 100 PTS began to cost... 166, 1 euro.