is there a way to mass/multi delete photos in all messages without deleteing the message

i have iOS 7, iPhone 4s and Mavericks.

i know i can tap and hold on the photo and the "more" option appears, then flip through the conversation and select individual messages to delete within that conversaion. but i have so many ongoing texts that i dont want to delete, and most have many photos within the message that go months back that i dont need. i dont want to delete the entire conversation but i dont need the photos embedded in the message. im tired of deleting photos from the message as soon as i read or sent a photo text. is there an option in the phone or an app that will mass delete embedded photos within all texts. either iphone or mac app would work... or a script... anything! i would even be happy with selecting all phones to delete across all messages the way the camera roll allows you to delete. its seems like an obvious option.

thanks