disable_editor_events_category_editing

function disable_editor_category_editing() {
//make it so that non-admin users can not edit event categories
    register_taxonomy( 'tribe_events_cat', 'tribe_events', array(
        'hierarchical' => true,
        'rewrite' => array( 'slug'=> 'events/' . sanitize_title( __( 'category', 'tribe-events-calendar' ) ), 'with_front' => false ),
        'public' => true,
        'show_ui' => true,
        'labels' => array(
        'name' =>   __( 'NTD Categories', 'tribe-events-calendar' ),
        'singular_name' =>  __( 'NTD Category', 'tribe-events-calendar' ),
        'search_items' =>   __( 'Search NTD Categories', 'tribe-events-calendar' ),
        'all_items' => __( 'All NTD Categories', 'tribe-events-calendar' ),
        'parent_item' =>    __( 'Parent NTD Category', 'tribe-events-calendar' ),
        'parent_item_colon' =>  __( 'Parent NTD Category:', 'tribe-events-calendar' ),
        'edit_item' =>  __( 'Edit NTD Category', 'tribe-events-calendar' ),
        'update_item' =>    __( 'Update NTD Category', 'tribe-events-calendar' ),
        'add_new_item' =>   __( 'Add New NTD Category', 'tribe-events-calendar' ),
        'new_item_name' =>  __( 'New NTD Category Name', 'tribe-events-calendar' )
    ),
    'capabilities' => array(
        'manage_terms' => 'update_themes',
        'edit_terms' => 'update_themes',
        'delete_terms' => 'update_themes',
        'assign_terms' => 'update_themes'
    )
    ));
}
add_action('init', 'disable_editor_category_editing');