Adds a category.
string $category: The category name.
string $recipients: The list of recipient e-mail addresses.
string $reply: The auto-reply text that is sent to a user upon completing the contact form.
boolean $selected: Boolean indicating whether the category should be selected by default.
function addCategory($category, $recipients, $reply, $selected) {
$edit = array();
$edit['category'] = $category;
$edit['recipients'] = $recipients;
$edit['reply'] = $reply;
$edit['selected'] = $selected ? '1' : '0';
$this
->drupalPost('admin/structure/contact/add', $edit, t('Save'));
}