This is outer rubbish. A. Ali just like Evlija Celebi called all inhabitants of the Bosnian Ejalet Bosniaks. The Bosnian self governance during the Ottoman empire covered most of Croatia, Serbia and Montenegro. It was this:
When Evlija Celebi travels through dalmatia and Bosnia and Serbia he explains that there are "Bosniaks Elajeti " who are the inhabitant of the whole Bosnian Ejalet. And "Bosniaks Milleti" who the Turks consider as ethnical Bosnians. Catholics in Bosnia were nothing else than Bosniaks Milleti for the Turks. However the Turks considered Croats and Serbs in Croatia and Serbia (which were part of the Bosnian Ejalet also as Bosniaks.
A. Alija, when travelling from Bihac to split, just like Evlija Celebi, mentioned that those people are Bosniaks (even if they are croats by ethnicity from origins). But that their origins are croatians (hundreds years ago they were not part of the Bosnian self governence before the Turks came).
All the Bosnian kings, Bans, the Popes and other call catholics from Bosnia only with one name: Bosnjani. The Popes even use the term "Nacionen Bossnessis" even if the modern nations come into existence 800 years later.
Explaining catholics from Bosnia as anything else than Bosnians is falsification of history.