disable contexts

$contexts = variable_get('context_status', array());
$disable = array('homepage','sitewide','dae_search_empty','webmasters','no_twitter','workbench_moderate_all','go-to-market','newsroom_events','communities_audence_link','digital_champion_newsroom','grand_coalition_pledge','workbench_moderate_all');
foreach($disable as $item) {
	  $contexts[$item] = TRUE;
}
variable_set('context_status', $contexts);