IMHO, a good design eg: database design is important...
you need to have pages like: Insert Content, Delete Conten, and Edit Content...
then you have to have a navigation/links to lead you to those pages that have just placed in your db... like for example, imo, the simplest way to do a links is: http://www.yoursite.com/index.php?target=page_to_load
OR
http://www.yoursite.com/index.php?target=about_us
in your database, it would look something like this:
Unique_Content_Name Content_of_page
about_us blahblahblah....
what it does is when you load the page, you can use $_POST['target'] in an SQL query...
you do a seach in your database using $_POST['target'] as your basis... the sql returns the row when it has found the $target... when u have the row, you can display Conten_of_page...
hopes that makes sense... also, there are lots of tutorials out there... you should look up tutorials such as "Inserting data to a database" tutorials... or you could get a good book...
at least thats what i think and based on the little experience that i have... i am after all a newbie too