nycga.net » NYCGA2012 Theme

Make Category a required field in the Add/Edit Event page (front and back).

Line 165

// require categories
add_action('em_event_validate', 'nycga_require_category', 2, 10);
function nycga_require_category($valid, $event)
{
    if ( empty($_POST['event_categories']) || $_POST['event_categories'][0] == '')
    {
        $event->add_error(__('Category is required'));
        return false;
    }
    return $valid;
}