// Prevent WP from adding 
 tags on all post types
function disable_wp_auto_p( $content ) {
  remove_filter( 'the_content', 'wpautop' );
  remove_filter( 'the_excerpt', 'wpautop' );
  return $content;
}
add_filter( 'the_content', 'disable_wp_auto_p', 0 );