Collapsible list – Open all items on page load

Please add this code to file functions.php of your active theme:

// Content Views - Collapsible list - open all items on page load
add_filter( 'pt_cv_collapsible_open_all', '__return_true' );

With Content Views Pro 4.3 and higher, you can enable this option per each View with option Open all items under Display Settings >> Layout.