I am working on a responsive theme and I need to remove the width and height attributes that are added to images when using the WYSIWYG editor. I have a filter that will strip out the elements but I need to know what hook to use. I have tried the_content but that doesn’t seem to work. Is there a specific hook I can use to filter the WYSIWYG content as it is being displayed?
ACF has a number of hooks for modifying fields – you’ll probably want to look at ‘acf/load_field’: http://www.advancedcustomfields.com/resources/filters/acfload_field/