How can I insert an HTML into a div with php code?
<p>I want to use a navigation bar with several hyperlinks in order to call external HTML pages but I don't want to repeat the whole webpage into the code inside the others.</p>

<p>So I was thinking about calling the webpages when clicking on the links with the aim to insert the external pages into a div inside my index.html.</p>

<p>Is this possible by using php code easily?</p>

<p>Or I need to use jquery?</p>

<p>Thanks in advance for the response.</p>