Collapsible List – open all items on page load

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

Otherwise, 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' );