How to catch if-statement block and name block in regular expressions

How to capture if-statement block. I've capture the else-statement block in a named Group. My current solution is at this permalink: http://ift.tt/1M8MKyq

@if\([^)]*\)\s*{(((?>(?<open>@if\([^)]*\)\s*{)|@{[^}]*}|[^}@]+|(?:}else{(?<else>([^}]*))(?=}endif@))|(?<-open>}endif@)))*(?(open)(?!)))}endif@

Content inside statement block are html related. I.e.

@if(prevbutton.visible=='True'){
    <div style="float:left; display:inline; margin-right: 5px; padding-top:7px;">
        <span class="arrows_prev" id="prevbottom" title="@{prevbutton.toindex}" rel="prev" data-page-number="@{prevbutton.toindex}"></span>
    </div>
}else{
    test
}endif@