How to Use A.I. to Categorize WordPress Posts

I have 82 blog posts on this site that I never bothered categorizing. I know I should but I really can’t be bothered to manually go through 82 posts and set a category.

Well, I made an A.I. agent in n8n that will do this for me and it’s AWESOME. It came up with 6 broad topic categories and then went through each post to set the category in literally 2 minutes. I’ll teach you how to use it.

The Problem with Manual WordPress Categories

Ever spent an hour trying to decide if a post belongs in “Marketing Tips” or “Marketing Strategy”? You’re not alone. Manual categorization a PAIN and often creates duplicate categories that confuse readers. I hate it.

Here’s what typically goes wrong:
• Categories become too broad or too specific
• Different writers use different naming conventions
• Old categories get forgotten and new duplicates appear

I once managed a blog with 500+ posts and 50 overlapping categories. Finding content was like searching for a needle in a haystack. Readers gave up. Traffic dropped.

Using A.I. for Smart Categorization

Before we can automate categorizing your posts, you need to come up with the categories first. If you get A.I. to generate categories for each blog post, you’ll get hundreds of categories.

• Too few categories (1-3) makes navigation difficult and groups unrelated content
• Too many categories (15+) dilutes SEO value and confuses readers
• The general rule is about 1 category per 8-12 blog posts

Here’s the simple process I use:

1. Export your blog posts as an RSS feed
2. Copy the content into ChatGPT or your preferred A.I. tool
3. Use this prompt:

Read these blog posts and suggest 5-7 main categories that would best organize this content. Explain your reasoning for each category.

I found that A.I. suggests categories that actually match how people search. For example, it grouped my marketing posts into “Beginner Marketing Tips” and “Advanced Strategy” – exactly how my readers think.

This approach cut my categorization time by 80%. A recent project with 200 posts took 30 minutes instead of 3 hours.

Here’s the prompt I use:

Given all the posts on my blog: https://rumjahn.com/feed/

Analyze these blog posts and suggest 6 relevant categories. Focus on broad topics that would help readers find related content. Keep categories consistent across posts.

If you A.I. of choice doesn’t read the website. Simply download the feed page as XML and then upload it to your A.I. chat.

Here’s what I got:

Based on the XML content, I can help categorize your blog posts. Currently, both posts are under the "Uncategorized" category. 

Main Categories:

AI Tools 
Digital Marketing 
Automation & Integration 
Productivity Tools 
Content Creation 
Analytics & Strategy 

Implementing A.I. Categories in WordPress

Don’t just blindly accept what the A.I. suggests. Follow these steps:

1. Review suggestions for accuracy
2. Look for patterns across posts
3. Create a master category list
4. Bulk update posts using WordPress tools

Remember: Categories should help readers navigate your site. If an A.I. suggestion doesn’t serve that purpose, skip it.

A.I. Agent to categorize all your posts

Now that you have your categories, you can build an n8n agent that goes through each blog post and set a category you already created.

Unfortunately, n8n’s wordpress node doesn’t support creation of categories. You’ll need to manually add the categories to your wordpress site. Once you’re done, you need to find the ID of your category.

Then edit the prompts I used:

System Prompt

You are an expert content strategist and taxonomy specialist with extensive experience in blog categorization and content organization.

Message Prompt

I will provide you with a blog post's title. Your task is to assign ONE primary category ID from this fixed list:

13 = Content Creation
14 = Digital Marketing
15 = AI Tools
17 = Automation & Integration
18 = Productivity Tools
19 = Analytics & Strategy

Analyze the title and return only the single most relevant category ID number that best represents the main focus of the post. While a post might touch on multiple topics, select the dominant theme that would be most useful for navigation purposes.

{{ $json.title.rendered }}

Output only the category number

You’ll need the category number replaced in the prompt for the workflow to work.

Enter your email in the below box to get my workflow for FREE. (Turn off adblock if you don’t see it).

Bonus: Extending to Tags

The same A.I. system works great for tags too. Just modify your prompt:

“Suggest 5-7 specific tags for each post that capture key topics, tools, or concepts mentioned.”

I’ve found this creates more precise tags than manual brainstorming. Plus, it maintains consistency across your whole site.

Time to Take Action

Start small. Pick your 10 most recent posts and try this system. You’ll quickly see how much time it saves.

Need help getting started? Drop a comment below with your questions. I answer every one personally.

Remember: Good organization makes great content even better. Your readers will thank you.