Static Page with php echo [duplicate]

Question

You need more than just telling the page where to find your theme. You will likely need to load WordPress.

You can do that with the following:

<?php 
define('WP_USE_THEMES', false);
require('./wp-load.php');
?>

Is the clpr_categories_list() a theme function? You could just WP’s wp_list_categories() function to what you need. The function accepts quite a number of arguments to customize the outpout.