I agree with what David said. You should have an Adsense account and lend small space of your website to google to show ads on your website. It’s easy to implement and Google provides step by step guidance in implementing the same.
Happy Learning & Earning!
As such, there is no option to hide the Write a Post section.
For the visitors, if you have changed your settings by disabling the write post section it won’t be visible to them.
For that here are the steps:
1. Click at the top right of Facebook and select Settings.
2. In the left column, click Timeline and Tagging.
3. Look for the setting Who can post on your timeline? and click Edit to the far right.
4. Click the dropdown menu and select Only Me.