How to merge two Wordpress sites

[BillEssley]

I have two different WordPress sites (with 2 different themes). I want to put some features and all posts/categories from theme 2 into theme 1.
Is it possible and what steps should I do?

 

[Developer]

I was going to post this section at the end, but in case you're
one who likes to dig right in without reading all instructions first...

... BACKUP ... BACKUP ... BACKUP ...

I am sure that goes without saying, however, be certain to perform
a backup for BOTH blogs before you do anything. AND, be sure to
keep a local copy as well as one server side, at least until you are
1,000% certain everything finished without a snag...

======

Visit the Tools -> Export section in your theme 2 dashboard.
Download the XML file of your blog’s content. This file should
contain your posts, pages, comments, categories, and tags.



Then, import that by visiting Tools -> Import on the theme 1
blog's dashboard.

Choose "WordPress" when asked for the format and then simply
follow the instructions.

You should be asked to upload that XML file that you previously
created when "exporting".

Let me know if you need any further assistance.

Ooh, and if I didn't mention it already, be sure to BACKUP before
all else, LOL...

 

[Eugeneus]

There are no impossible things. Why don't just just create on site1 the same categories as on site2 and copy the posts? If its a lot of work for manual, you can use a script. I can write for your script that will create those categories and put to them appropriate posts from site2 to site1. I don't know maybe exists some free plugin for exporting and importing this kind of data.