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IMPORTANT! Please deactivate before upgrading, then re-activate the plugin.

Unpackage contents to wp-content/plugins/ so that the files are in a collapsing-categories directory.

Widget installation

Activate the plugin, then simply go the Presentation > Widgets section and drag over the Collapsing Categories Widget.

Manual installation

Activate the plugin, then insert the following into your template: (probably in sidebar.php). See the Options section for more information on specifying options.

<?php 
echo "<ul>\n";
if (function_exists('collapsCat')) {
  collapsCat();
} else {
  wp_get_categories(your_options_here);
}
echo "</ul>\n";
?>