Related Post with Custom Taxonomy Sort

Dear king,
i’m trying to use your great plugin with Related post, but it always use the default wordpress category order.
Please any help appreciate.

Here the code:

function get_related_posts($postdata)

{
	$postCatArr = wp_get_post_categories($postdata->ID);
	$post_array = array();
	for($c=0;$c<count($postCatArr);$c++)
	{
		$category_posts=get_posts('category='.$postCatArr[$c]);
		foreach($category_posts as $post)
		{
			if($post->ID !=  $postdata->ID)
			{
				$post_array[$post->ID] = $post;
			}
		}
	}
if($post_array)
{
?>
<div class="realated_post clearfix">
<h3><span>Localit&agrave; Simili</span></h3>

<ul class="category_grid_view clearfix">
<?php
	$relatedprd_count = 0;
	foreach($post_array as $postval)
	{
		$product_id = $postval->ID;
		$post_title = $postval->post_title;
		$productlink = get_permalink($product_id);
		$post_date = $postval->post_date;
		$comment_count = $postval->comment_count;
		$text = $postval->post_content;
		$length = 100;
		$text = strip_tags($text);
		if(strlen($text)>$length)
		{
			$text = substr($text, 0, $length);
			$text = substr($text, 0, strrpos($text, " "));
			$text = $text.' ...';
		}
		if($postval->post_status == 'publish')
		{
			$post_images = bdw_get_images($postval->ID,'large');

			if($post_images[0]!='')
			{
				$relatedprd_count++;
			?>

https://www.ads-software.com/extend/plugins/custom-taxonomy-sort/