better is : moving the categories trough the back-office.
change the file conf/_admin.php

And then assing your categories to another blog.

/** * Cross posting
 * Possible values:
 *   - 0 if you want users to post to a single category only
 *   - 1 if you want to be able to cross-post among multiple categories
 *   - 2 if you want to be able to cross-post among multiple blogs/categories
 *   - 3 if you want to be able to change main cat among blogs (which will move the
 *       posts from one blog to another; use with caution)
 * @global int $allow_cross_posting */
$allow_cross_posting = 1;


/** Moving chapters between blogs?
 * @global bool $allow_moving_chapters */
$allow_moving_chapters = false;

Is it the "allow_moving_chapters" piece changed to 'true', or just changing cross-posting to 2? I actually have crossposting set to 3 right now anyway, just overlooked that as a possibility. I guess I'm just trying to eliminate as much as possible the 'broken links in search engines' issue.

If I approach this as moving the posts by creating new categories in the new blog, then moving the posts to the new blog by crossposting and then removing the original post location, the same category name will have been assigned a new number within the original stubname structure and, hence, will have a different URL than the original post.

I figured if I could alter the reference in the table, then the category name would stay the same, the same stubname would be used for the new blog as the old, and that way no links will be broken in search engines.

jj.

Don't crosspost.

Just move the categories to another blog.

Change from false to true, and you will see in the backoffice that you can move the categories to another blog.

That point you won't have errors in your links.