Allow HTML content in field description

prefix_html_in_description.php

<?php
/**
 * Allow HTML content in field description
 */
function prefix_html_in_description( $description, $item, $additional_info='' ) {
  $field_description = ! empty( $item['field_description'] ) ? $item['field_description'] : '';

  // Allow HTML content in the field description
  $allowed_tags = wp_kses_allowed_html( 'post' );
  $field_description = wp_kses( $field_description, $allowed_tags );

  $description = sprintf(
    '<div class="pewc-description">%s%s</div>',
    $field_description,
    $additional_info
  );

  return $description;
}
add_filter( 'pewc_filter_field_description', 'prefix_html_in_description', 10, 3 );