while creating a article I want to show some HTML code as part of content, but after saving that article that particular snippet of HTML code get executed.
I am using joomla 1.5 | code citation extension for insert code in article. Is there any solution?
You should turn off HTML stripping, or include it as a Custom HTML Module, and writing the position in the article with load position. to load the custom HTML you've put in the Module. i.e.
{loadposition YourModulePosition}
Will load anything you place within a Custom HTML Module.
The correct way should be to paste the code into the wysiwyg (design view, not raw code view) - as long as you have a decent editor the angle brackets should be converted to html entities and it should just work.
The built-in Geshi plugin - though a little dated - is usually all that is needed to make add colored highlighting. The plugin is a little dated but after inserting your code all you need to do to make it work is add:
<pre class="html"> ... </pre>
around your html. Chenge HTML to js, css, etc depending upon the code to be shown.