I would like to disable taxonomy hierarchy for a vocabulary. In older versions of Drupal there used to be a setting on the vocabulary page:

Hierarchy: disabled

Can do I achieve this with Drupal 7?

1 Answer 1


I found how to do it. I ended up using hook_form_FORM_ID_alter on the taxonomy form in the admin area, like so:

function hook_form_taxonomy_overview_terms_alter(&$form, &$form_state) {    
        $form['#parent_fields'] = FALSE;

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