Sort Blog Categories by name

blog-categories-sorting.php

<?php
/*
Plugin Name: Blog Categories Sorting
Plugin URI: https://premium.wpmudev.org/
Description: Sort Blog Categories by name
Author: Panos Lyrakis @ WPMUDEV
Author URI: https://premium.wpmudev.org/
License: GPLv2 or later
*/

if( ! class_exists( 'WPMUDEV_BlogCategories_Sort' ) ){
	class WPMUDEV_BlogCategories_Sort{

		private static $_instance = null;
		public $order;
		public $order_by;

		public static function get_instance() {
			if ( is_null( self::$_instance ) ) {
				self::$_instance = new WPMUDEV_BlogCategories_Sort();
			}
			return self::$_instance;
		}


		private function __construct(){

			//For desc change to SORT_ASC
			$this->order = SORT_ASC;

			$this->order_by = 'name';

			add_filter( 'nbt_signup_templates', array( $this, 'resort_blog_categories' ), 10, 1 );

		}

		public function resort_blog_categories( $templates ){

			return $this->array_msort( $templates, array( $this->order_by => $this->order ) );

		}

		function array_msort( $array, $cols ){

		    $colarr = array();
		    foreach ( $cols as $col => $order)  {
		        $colarr[$col] = array();
		        foreach ( $array as $k => $row ) { $colarr[$col]['_'.$k] = strtolower( $row[$col]) ; }
		    }

		    $eval = 'array_multisort(';
		    foreach ( $cols as $col => $order ) {
		        $eval .= '$colarr[\''.$col.'\'],'.$order.',';
		    }

		    $eval = substr( $eval,0,-1 ).');';
		    eval( $eval );

		    $ret = array();
		    foreach ( $colarr as $col => $arr ) {
		        foreach ( $arr as $k => $v ) {
		            $k = substr( $k,1 );
		            if (!isset($ret[$k])) $ret[$k] = $array[$k];
		            $ret[$k][$col] = $array[$k][$col];
		        }
		    }
		    return $ret;

}

	}

	add_action( 'plugins_loaded', function(){
          $GLOBALS['WPMUDEV_BlogCategories_Sort'] = WPMUDEV_BlogCategories_Sort::get_instance();
     }, 10 );

}