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$wpe_all_domains=array ( 0 => 'mentalhealthcenter.org', 1 => 'mentalhealthce.wpengine.com', 2 => 'www.mentalhealthcenter.org', );

//set featured image as div background
function featured_bg_function() {
	global $post;
	return 'style="background: url('. wp_get_attachment_url( get_post_thumbnail_id($post->ID) ).') no-repeat center; background-size:cover;" ';
}

add_shortcode('featured_bg', 'featured_bg_function');