my_cat_list

<?php
/**
 * Custom snippet based on WordPress get_the_category() function.
 * Gives unique CSS class name to each category link
 * like class="cat-item-1" where 1 is a category ID number.
 * Add function to functions.php file.
 * Place <?php my_cat_list(); ?> to wp loop.
**/

function my_cat_list() {
    $sep = '';
    foreach((get_the_category()) as $category) {
    echo $sep . '<a href="' . get_category_link( $category->term_id ) . '" class="cat-item-' . $category->cat_ID . '" title="View all posts in ' . $category->cat_name . '" >' . $category->name. '</a>';
        $sep = ', ';
    }
}
?>