I’m attempting to configure a setting that controls which post types are registered. I’ve pretty much got the settings page where I need it, but I’m having trouble getting which values are checked. The field group is as follows

piklist('field', array(
	'type' => 'group'
	,'field' => 'cpt_list'
	,'label' => __('Activate Features', 'checosystem')
	,'list' => false
	,'fields' => array(
		array(
		'type' => 'checkbox'
		,'field' => 'common_features'
		,'label' => __('Common Features', 'checosystem')
		,'label_position' => 'before'
		,'value' => 'third'
		,'choices' => array(
			'cause_issue' => 'Cause & Issue Management'
			,'team_manager' => 'Team Member Management'
		)
		,'columns' => 2
		)
	,array(
		'type' => 'checkbox'
		,'field' => 'community_engagement'
		,'label' => __('Community Engagement', 'checosystem')
		,'label_position' => 'before'
		,'value' => 'second'
		,'choices' => array(
			'volunteer_management' => 'Volunteer Management'
			)
		,'columns' => 2
		)
	,array(
		'type' => 'checkbox'
		,'field' => 'grassroots_campaigns'
		,'label' => __('Grassroots Advocacy', 'checosystem')
		,'label_position' => 'before'
		,'value' => 'second'
		,'choices' => array(
			'campaign_management' => 'Campaign Management'
			)
		,'columns' => 2
		)
	)
));

I’d like to get the checked values to evaluate which options are check prior to registering the associated post types. For instance:

$theme_options = get_option('my_theme_settings');

  $text_field = $theme_options['cpt_list'];

  if 'cause_management' {
// do this
}

My experience with PHP is limited, but I’ve tried to get the value of the nested (correct term?) array to no avail. I found one possible example in the demo and documentation but it seems to require a postid. Any help would be much appreciated.