Небольшой хак для Редактора категорий на сайте, смысл заключается в следующем: при вводе имени категории, автоматически заполняется поле 'Альтернативное имя' транслитом.
Также при редактировании поля альтернативного имени, при вводе русских символов происходит динамическая транслитерация.

Пробовал на версиях 7.5, 8.0, 8.2, 8.3

Приступаем:
Открываем файл engine\skins\default.js и в начало файла вставляем:

 function AutoTranslit1()
    {        
        a=document.formText.alt_cat_name.value;
        document.formText.alt_cat_name.value=raytranslate(a);
    }
    
    function AutoTranslit2()
    {        
        a=document.formText.cat_name.value;
        document.formText.alt_cat_name.value=raytranslate(a);
    }
    
    var cyr=new Array("jo","zh","i","ch","sh","xh","je","ju","ja","a","b","v","g","d","e","z","i","k","l","m","n","o","p","r","s","t","u","f","x","c","b","y","b","j","h","-", "", "", ""); 
    var lat=new Array("ё","ж","й","ч","ш","щ","э","ю","я","а","б","в","г","д","е","з","и","к","л","м","н","о","п","р","с","т","у","ф","х","ц","ь","ы","ъ","ж","х", " ", "/", "|", ""); 
    var latcap=new Array("Ё","Ж","Й","Ч","Ш","Щ","Э","Ю","Я","А","Б","В","Г","Д","Е","З","И","К","Л","М","Н","О","П","Р","С","Т","У","Ф","Х","Ц","Ь","Ы","Ъ","Ж","Х", " ", "/", "|", ""); 

    function raytranslate(tex) 
    { 
    var buf=tex; 
    var i; 
    for (i=0;i<latcap.length;i++) 
            { 
            buf=trreplace(buf,latcap[i],cyr[i],1,0); 
            } 

    for (i=0;i<lat.length;i++) 
            { 
            buf=trreplace(buf,lat[i],cyr[i],1,0); 
            } 

    tex=buf; 
    return tex; 
    } 

    function trreplace(target,oldTerm,newTerm,caseSens,wordOnly) { 

            var work = target; 
            var ind = 0; 
            var next = 0; 

            if (!caseSens) { 
              oldTerm = oldTerm.toLowerCase(); 
              work = target.toLowerCase(); 
            } 

            while ((ind = work.indexOf(oldTerm,next)) >= 0) { 
              if (wordOnly) { 
                var before = ind - 1; 
                var after = ind + oldTerm.length; 
                if (!(space(work.charAt(before)) && space(work.charAt(after)))) { 
                  next = ind + oldTerm.length; 
                  continue; 
                } 
              } 
              target = target.substring(0,ind) + newTerm + 
              target.substring(ind+oldTerm.length,target.length); 
              work = work.substring(0,ind) + newTerm + 
              work.substring(ind+oldTerm.length,work.length); 
              next = ind + newTerm.length; 
              if (next >= work.length) { break; } 
            } 

            return target; 

    }

2. Далее открываем файл engine\inc\categories.php
Ищем строку (по умолчанию строка #298):

<input class="edit" value="{$row['name']}" type="text" name="cat_name">

Заменяем на:

<input class="edit" value="{$row['name']}" type="text" name="cat_name" id="cat_name" onchange="AutoTranslit2();" onkeypress="AutoTranslit2();" onkeyup="AutoTranslit2();">

Ищем строку (по умолчанию строка #302):

<input class="edit" value="{$row['alt_name']}" type="text" name="alt_cat_name">

Заменяем на:

<input class="edit" value="{$row['alt_name']}" type="text" name="alt_cat_name" id="alt_cat_name" onchange="AutoTranslit1();" onkeypress="AutoTranslit1();" onkeyup="AutoTranslit1();">

Ищем строку (по умолчанию строка #472):

<input class="edit" type="text" name="cat_name">

Заменяем на:

<input class="edit" type="text" name="cat_name" id="cat_name" onchange="AutoTranslit2();" onkeypress="AutoTranslit2();" onkeyup="AutoTranslit2();">

Ищем строку (по умолчанию строка #476):

<input class="edit" type="text" name="alt_cat_name">

Заменяем на:

<input class="edit" type="text" name="alt_cat_name" id="alt_cat_name" onchange="AutoTranslit1();" onkeypress="AutoTranslit1();" onkeyup="AutoTranslit1();">

Готово!