Open new tab on button click using JQUERY

My scene is like this:

I have edit user module. Each user is assigned a base INI file . When we edit a user, we have a drop down menu from which to select his base INI file.

After selection, we can save the user. And the ID of the selected file is also saved.

everything is normal.

However, when we edit a user, I have the option to let the user create custom_ini_file. So when he clicks the edit button, the code copies the content from a file and creates a new file, then lets the user make custom changes in it, and the file will be saved.

Now I want to open this edit custom_ini_filein a new tab or window and keep the user edit page open. Once he has finished editing the file, only then can he go back to editing the user and save the user.

So basically, he should be able to edit users and files.

Now in the edit user, I have a dropdown like this along with the "edit" button:

<tr>
    <td>Base INI File</td>
    <?php 

        if(isset($_GET['id'])) { 
            $id=$_GET['id']; 
            btn_edit($id); 
        } 
    ?>  
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script> 


    <td> 
        <select required name="base_ini_id" id="base_ini_id" class="form-control"> 
            <option value="">Select</option> 
            <?php foreach($base as $value) { ?> 
                <option id="emp" class="specialLink" value="<?php echo $value->id;?>"><?php echo $value->base_ini_filename;?></option> 
            <?php } ?> 
        </select> 
    </td> 
    <td> 
        <?php echo btn_edit('customer/upload_ini/edit_ini_custom/'); ?> 
    </td> 
    <script type="text/javascript"> 
        $(document).ready(function() { 
            $('#base_ini_id').change(function() { 
                var id = $("#base_ini_id").val();
                var url = "/project/customer/upload_ini/edit_ini_custom/";

                $("#edit_link").attr("href",url+ id); 

            }); 
        }); 
    </script>
</tr>

edit button

function btn_edit ($uri)
{
    return anchor($uri, '<i class="glyphicon glyphicon-edit"></i>','id="edit_link"');
}