Dynamic sidebar with PHP

may be screenshot will help explaining what you are saying. I have not understood what you have just said!

Ok, so here is the screenshot

I don't think there is PHP solution as issue is HTML. I would suggest you use Javascript to just show heading and one drop list per click(accordion). I know my explanation are unclear but check this JQuery UI element to get picture:
http://jqueryui.com/themeroller/#themeGallery

I get it but what if there are too many headers? I want something that will stretch the div along with it.

May be use CSS

I use CSS but what code I need to use to make it stretch itself along with the div?

I use CSS but what code I need to use to make it stretch itself along with the div?

What do you mean?

My sidemenu which is inside a div, when too long stretches itself but it goes outside the div instead of stretching the div because it uses 'float: right' css property. What to do to make it stretch the div if it's too long(about 100 lines of text)?

What to do to make it stretch the div if it's too long(about 100 lines of text)?

If I understand well your question, then you would use same css proerty you used with element itself

Hi Nahiyan,

This is a CSS question, not PHP.

The div that contains your menu should expand to fit its content unless it has a fixed height. You could use the 'overflow' property to create scroll bars if the content is too long for a fixed height div but I personally think they look terrible.