Those __What_Ever__ Tags are not available for use everywhere. Only available in the specific templates they were created by boonex for. They are not meant for general use.
These are the only type of tags that are available and will work pretty much any html template.
* Avalable constructions.
* 1. <bx_include_auto:template_name.html /> - the content of the file would be inserted. File would be taken from current template if it existes there, and from base directory otherwise.
* 2. <bx_include_base:template_name.html /> - the content of the file would be inserted. File would be taken from base directory.
* 3. <bx_include_tmpl:template_name.html /> - the content of the file would be inserted. File would be taken from tmpl_xxx directory.
* 4. <bx_url_root /> - the value of $GLOBALS['site']['url'] variable will be inserted.
* 5. <bx_url_admin /> - the value of $GLOBALS['site']['url_admin'] variable will be inserted.
* 6. <bx_text:_language_key /> - _language_key will be translated using language file(function _t()) and inserted.
* 7. <bx_image_url:image_file_name /> - image with 'image_file_name' file name will be searched in the images folder of current template.
* If it's not found, then it will be searched in the images folder of base template. On success full URL will be inserted, otherwise an empty string.
* 8. <bx_icon_url:icon_file_name /> - the same with <bx_image_url:image_file_name />, but icons will be searched in the images/icons/ folders.
* 9. <bx_injection:injection_name /> - will be replaced with injections registered with the page and injection_name in the `sys_injections`/`sys_injections_admin`/ tables.
* 10. <bx_if:tag_name>some_HTML</bx_if:tag_name> - will be replaced with provided content if the condition is true, and with empty string otherwise.
* 11. <bx_repeat:cycle_name>some_HTML</bx_repeat:cycle_name> - an inner HTML content will be repeated in accordance with received data.
Of course none of those will get you what you want to do. To achive what you want will require very specific source code mods on the PHP files. Your very limited on what can be done within the html files.
