gistfile1.js

// js where you add header for the table dynamically
field = "user_type"
field_split = field.split("_")
field_text = field_split.join(" ")
console.log(field_text) // user type

var th = $('<th>', {
    text : field_text,
    class: "text-capitalize",
    })

// css
.text-capitalize {
    text-transform:capitalize;
}

So when u render, <th class="text-capitalize"> user type </th>
and in browser, you can see as User Type.