wpcrmsystem/ninja-demo-page-filter.php

## ninja-demo-page-filter.php
<?php
function add_pages_to_filter( $array ) {
  $array[] = 'post-new.php?post_type=my-custom-post-type';
  return $array;
}

add_filter( 'nd_allowed_pages' , 'add_pages_to_filter' );
	<?php
	function add_pages_to_filter( $array ) {
	$array[] = 'post-new.php?post_type=my-custom-post-type';
	return $array;
	}

	add_filter( 'nd_allowed_pages' , 'add_pages_to_filter' );