Hide the "Show All" option

Hi itadhkbn , 

in one of my projects, I used JavaScript to remove the "show all", just create a component with the following JavaScript code and add it to PostPage.

<@liaAddScript>
....
....    
    function  removeShowAll () {
        var boardObj = document.getElementById('lia-board');
        for(var i=0; i < boardObj.options.length; i++) {
            if(boardObj.options[i].value == "$more$" ) {
                boardObj.remove(i);
                return true;
            }           
        }
    } 

</@liaAddScript>

be careful with this removal, as the dropdown list shows 20 boards, you can't see all boards there if you have more than 20 boards, you may consider to increase the number under 

Admin->features->ask a question->number of boards to display

Hi Haidong. Thanks for your reply.

FYI. I have used the below code to hide the option.

<script type="text/javascript">
if ($("#lia-board option:last").val()=="$more$"){
$("#lia-board option[value='$more$']").remove();
}
</script>