The text for Total defense reads as.
Total Defense
You can defend yourself as a standard action. You get a +4 dodge bonus to your AC for 1 round. Your AC improves at the start of this action. You can't combine total defense with fighting defensively or with the benefit of the Combat Expertise feat. You can't make attacks of opportunity while using total defense.
Emphasis mine.
Is there any way to still use Attacks of Opportunity while using the total defense action?
The specific situation is a character with the Bodyguard feat wants to be able to use the total defense action to activate the Covering Defense feat and still use Bodyguard.