556773 wordpress 301 redirects 2

Hello, We have a wordpress blog with 600-700 posts. Our aim is to add new subcategories but in order to maintain proper SEO we want to be done 301 redirects. I will give an example what we are trying to do : We have URLs from this type www .[login to view URL] CATEGORY/ a-test-post We are going to add new subcategory called for example Estate Planning So new URL should be www .[login to view URL] CATEGORY/ estate-planning/ a-test-post I made excel table with all links,all posts and new subcategories to which they have to be assigned. Thats all. Please bid ONLY if you are able to handle this project. Thank you