Campaign::getSites

static function getSites()
{
	static $sites = null;
	if ($sites === null)
	{
		$sites = SiteTable::getList(['select' => ['LID', 'NAME']])->fetchAll();
		$sites = array_combine(
			array_column($sites, 'LID'),
			array_column($sites, 'NAME')
		);
	}

	return $sites;
}