How to move the CTA between the Image and the Text?

To achieve a look as in the example above, where the call to action is positioned above the text, all you have to do is to tweak the CSS of the blurb a little bit. First, make the text container position relative and add a top margin to the text content to make room for the button. 

Then position the button container absolute.

The actual numbers can vary depending on the configuration of your button. Depending on the buttons content you might need to play with the top positioning.