Change theme variables in your module
This is how you can affect variables before sent to theme templates based on the URL. In this case I had to remove an empty sidebar in RootCandy theme.
<?php
/**
* Implementation of hook_preprocess_page().
*/
function support_filter_preprocess_page(&$vars) {
if (arg(0) == "domainuser" OR arg(0) == "support_filter") {
unset($vars['admin_left']);
}
}
?>
Don't forget to rebuild theme registry by use admin_menu modules Flush all caches > Theme Registry or drupal_rebuild_theme_registry();