When you create a knowledge in HTML format, any HTML code will be 'interpreted' by the browser, so that the audience will see the rendered result, but not the actual underlying code.
In some situation, you might want to list the underlying code as part of a knowledge. To achieve this, you will have to put your HTML code in a [ EB_CODE ] ... [/EB_CODE] block. Please note that there is no spaces in [ EB_CODE ], i.e it is exactly 9 characters: [ E B _ C O D E ]
You can have multiple [ EB_CODE ] ... [/EB_CODE] block
In the example below you will not see the [ EB_CODE ] and [/EB_CODE], but you will see everything in between as HTML code.