Dynamic Text on web page

I’m developing a website for a government agency that will require some information on a web page being replaced from time to time. I have a basic template that is built around tables. In the center of the page I have a table that is one col and 1 row. Is there a way to insert text from another file into the table? Can a call to the html file be made so the contents of the external html is displayed into the table? Any help would be greatly appreciated.