It depends on what
you want.
If you want to cache those pages you can add on each page a meta tag:
<meta http-equiv="Cache-control" content="public">
But keep in mind, that maybe not all users will see changes if you are using cache.
A better way is to use .htaccess to enable browser caching or even better configure it in your apache2 config.
You are more flexible with this.
Code:
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 1 seconds"
ExpiresByType text/html "access plus 1 seconds"
ExpiresByType image/x-icon "access plus 2592000 seconds"
ExpiresByType image/gif "access plus 2592000 seconds"
ExpiresByType image/jpeg "access plus 2592000 seconds"
ExpiresByType image/png "access plus 2592000 seconds"
ExpiresByType text/css "access plus 604800 seconds"
ExpiresByType text/javascript "access plus 86400 seconds"
ExpiresByType application/x-javascript "access plus 86400 seconds"
</IfModule>
or
(this is my way to cache images, css etc.)
Code:
<FilesMatch "\.(?i:gif|jpe?g|png|ico|css|js|swf)$">
<IfModule mod_headers.c>
Header set Cache-Control "max-age=172800, public, must-revalidate"
</IfModule>
</FilesMatch>