Kohana 3：如何在WordPress等模板/视图中提供API函数？

I'm working on a project which allows the advanced user to define their own way of showing the information and access some basic API. For example, I provide a show_search_box() function so that the user can call this function in the view file when they want to show the standard search box, or they could call the function with parameters to customize the search form. I'm working on a project which allows the advan