// remove the delete link for the specific category
function category_row_actions( $actions, $tag ) {
    if ( $tag->term_id == PROTECTED_TERM_ID ) unset( $actions[\'delete\'] );
    return $actions;
}

// create the category if not excists (in case it\'s removed again in another theme)
if (file_exists (ABSPATH.\'/wp-admin/includes/taxonomy.php\')) {
    require_once (ABSPATH.\'/wp-admin/includes/taxonomy.php\'); 
    if ( ! get_cat_ID( \'One page\' ) ) {
        $onepage_cat_id = wp_create_category( \'One page\' );
        define( \'PROTECTED_TERM_ID\', $onepage_cat_id );
    }
}

// make sure PROTECTED_TERM_ID is defined for the filter
if (!defined(\'PROTECTED_TERM_ID\')) {
    $idObj = get_category_by_slug(\'one-page\'); 
    $onepage_cat_id = $idObj->term_id;
    define( \'PROTECTED_TERM_ID\', $onepage_cat_id );
}
if ( is_admin() ) {
    add_filter( \'category_row_actions\', \'category_row_actions\', 10, 2 );
}