phpMyDirectory (PMD) is a great directory software. You can browse listings via Category, Location or Category-Location. However, for some directory, it is not necessary to have category-location as many of them do not contain any listing. This may give poor SEO.
If your directory falls under this category, you may want to disable Category-Location in the Sitemap & Listing Page. To disable there are 3 files that you need to modify.
1. /xml.php
Find this code
if($categories_count > 0 AND $locations_count > 0) {
Replace it with
if($categories_count > 0 AND $locations_count > 0 AND FALSE) {
2. browse_categories.tpl – in template directory
Find this code
<?php if($location_columns) { ?>
Replace it with
<?php if($location_columns AND FALSE) { ?>
3. browse_location.tpl – in template directory
Find this code
<?php if($category_columns) { ?>
Replace it with
<?php if($category_columns AND FALSE) { ?>