Tips on Customizing Charity Campaigns & Fundraising System

How to Hide Charity Campaigns & Fundraising System Admin Menus

function plt_hide_charity_campaigns_menus() {
	//Hide "Charity Campaigns".
	remove_menu_page('ccfs-dashboard');
	//Hide "Charity Campaigns → Dashboard".
	remove_submenu_page('ccfs-dashboard', 'ccfs-dashboard');
	//Hide "Charity Campaigns → All Campaigns".
	remove_submenu_page('ccfs-dashboard', 'edit.php?post_type=ccfs_campaign');
	//Hide "Charity Campaigns → All Donations".
	remove_submenu_page('ccfs-dashboard', 'edit.php?post_type=ccfs_donation');
	//Hide "Charity Campaigns → Settings".
	remove_submenu_page('ccfs-dashboard', 'ccfs-settings');
}

add_action('admin_menu', 'plt_hide_charity_campaigns_menus', 1000);

Where do I put this code?

How to Hide Charity Campaigns & Fundraising System Meta Boxes

function plt_hide_charity_campaigns_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Campaign Details" meta box.
	remove_meta_box('ccfs_campaign_details', $screen->id, 'normal');
	//Hide the "Campaign Donors" meta box.
	remove_meta_box('ccfs_campaign_donors', $screen->id, 'side');
	//Hide the "Donation Details" meta box.
	remove_meta_box('ccfs_donation_details', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_charity_campaigns_metaboxes', 20);