Hello,
I already implemented such a system for posting content. Also this blog is implemented from both sides user and admin. This part I implemented on my educational website whitch I created for my bachelor degree in college.
If you want I can sent to you some print screen to see if is close of what you want for your website.
I am new on this website and I want to gain some good feedback, the price is relative.
Best regard,
Boldis Adrian