Found Unwanted Links in our Contents - How to stop link insertion

Hi,

I found some unwanted links in our contens. Notice one thing that these links are appear in dynamic contents (Which are submitted from admin panel) for example Faq details, New and update of page.

When i submit details then all things are looking fine but after few days or weeks then i check contents then found some unwanted links which are not appearing on site because either in style hidden attribute or font size is 0, these will appear only in admin panel source code.

Example...

Found Unwanted Links in our Contents - How to stop link insertion WordPress ...