Try this:
function my_custom_pages_columns( $columns ) {
$myCustomColumns = array(
'template' => __( 'Template')
);
$columns = array_merge( $columns, $myCustomColumns );
return $columns;
}
function custom_admin_css() {
echo '<style type="text/css">
td.column-template { width: 150px; }
th.column-template { width: 150px; }
</style>
';
}
function custom_page_column_content( $column_name, $post_id ) {
if ( $column_name == 'template' ) {
$page_template = get_field( '_wp_page_template' );
if ( $page_template) {
$page_template = str_replace ( "default" , " " , $page_template );
$page_template = str_replace ( "template-" , "(" , $page_template );
$page_template = str_replace ( ".php" , ")" , $page_template );
echo $page_template;
}
}
}
add_action('admin_head', 'custom_admin_css');
add_filter( 'manage_pages_columns', 'my_custom_pages_columns' );
add_action( 'manage_pages_custom_column', 'custom_page_column_content', 10, 2 );
The only thing is the get_field() call may not work with custom fields, I don’t know.