var htmlTemplate = (function(){
    
    var html = [];
    var title_idx = 3;
    var url_idx = 6;
    var comment_idx = 9;
    
    html.push('<div class="entry">');
    html.push('    <ul>');
    html.push('        <li> Title: ');
    html.push('');        
    html.push(       '</li>');
    html.push('        <li> URL: ');
    html.push('');        
    html.push(       '</li>');
    html.push('        <li> Comment: ');
    html.push('');        
    html.push(       '</li>');
    html.push('    </ul>');
    html.push('</div>');
    
    return function(title,url,comment){
        
        html[title_idx,url_idx,comment_idx] = "";
        
        html[title_idx] = title;
        html[url_idx] = url;
        html[comment_idx] = comment;
        
        return html.join("");
    };
}());

$("#url_entry")
    .append($(htmlTemplate("twitter","http://twitter.com","twitter top page")));

<div id="url_entry">
</div>

.entry{
    background-color : #EFEFEF;
    padding : 10px;
}

.entry li {
    
}

jsFiddle