Mullahs Marching Against The Regime?

CNN points to this photo and writes:

In a blatant act of defiance, a group of Mullahs took to the streets of Tehran, to protest election results that returned incumbent President Mahmoud Ahmadinejad to power. ... They are the country's conservative clerics; the guardians of the Islamic revolution and its ideologies. They're loyal only to God and Iran's supreme leader, Ayatollah Ali Khamenei.