Changing the filter category order in Photolux
WordPress by default doesn’t provide an order option to the categories. One way to set a custom order to your categories would be to order them by their slug. To do this, first you have to open the template-grid-gallery.php file and modify line 44:
$args=array("hide_empty"=>false, "hierarchical"=>true);
to be like this:
$args=array("hide_empty"=>false, "hierarchical"=>true, 'orderby'=>'slug');
with this change your categories will be ordered by slug, so by editing their slug you can change the order. One option would be to append a number like this:
1-photography
2-landscapes
3-portraits