This Code can be added to the functions.php of the Theme (Child Theme) or to wpCasa Functions Plugin.

wpcasa-functions.php

<?php

/**
 * Custom Order Options
 */
 
add_filter('wpcasa_property_archive_title_order_args', 'custom_property_archive_title_order_args');

function custom_property_archive_title_order_args($args) {
  
	$args = array(    
		'orderby' => true,
		'order'   => true,
		'labels'  => array(	
			'orderby'     => _x( 'Order by', 'property title actions', 'wpcasa' ),
			'date'	      => _x( 'Date', 'property title actions', 'wpcasa' ),
			'orderby_sep' => _x( 'or', 'property title actions', 'wpcasa' ),
			'price'	      => _x( 'Price', 'property title actions', 'wpcasa' ),
			'order'	      => _x( 'Order', 'property title actions', 'wpcasa' ),
			'desc'	      => _x( 'DESC', 'property title actions', 'wpcasa' ),
			'order_sep'   => _x( 'or', 'property title actions', 'wpcasa' ),
			'asc'	      => _x( 'ASC', 'property title actions', 'wpcasa' )		
		)    
	);
	
	return $args;
	
}