```
/* -------------------------------------------------------------------------------------
  Add "Get a Quote" to gallery images
  ----------------------------------------------------------------------------------- */
function filter_gallery_captions($image) {
	$image['caption'] .= '<a class="btn btn-default btn-gallery-quote" href="/building-quote/?item='.urlencode($image['src']).'&title='.urlencode($image['title']).'"><span class="hidden-xs">Get a Quote to Build This</span><span class="visible-xs">Quote Me This</span></a>';
	return $image;
}
add_filter( 'envira_albums_gallery_lightbox_image', 'filter_gallery_captions');
```