The “rule” against splitting infinitives appeared in the 1800s, but it wasn’t initially put forth as a rule. See what was on Henry Alford’s mind when he advised against the construction.
Splitting infinitives is a grammar topic, but the “rule” you may have learned against splitting infinitives isn’t as hard-and-fast as you might imagine.
Of course you can, if you refer to:
Source: quickanddirtytips