Example of how to change Church Content plugin post type URL slug (e.g. "sermons" to "messages")

ctc-change-sermon-slug.php

<?php

/**
 * Change sermon slug in URL
 * 
 * Example of how to change sermon slug in Church Content plugin.
 * This is ideally placed in your own functionality plugin so that it works after switching themes.
 *
 * REQUIRED: Go to Settings > Permalinks and save after applying this, or it will not take effect
 * 
 * More info: https://churchthemes.com/guides/developer/church-content/#modifying-post-types
 *
 * @param array $args Post type registration arguments yourprefix_change_sermon_slug
 * @return array Filtered arguments with new slug
 */
function yourprefix_change_sermon_slug( $args ) {

	$args['rewrite']['slug'] = 'newslug';

	return $args;

}
add_filter( 'ctc_post_type_sermon_args', 'yourprefix_change_sermon_slug' );