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var equalheight = function(container){

    $.each($(container), function(){

        var $container = $(this);
        var $items = $container.children('a');
        var gobalHeight = null;
        var level = 'max';

        $.each($items, function(){
            var $item = $(this);
            var itemHeight = $item.height();

            if (gobalHeight === null
                || (level === 'min' && itemHeight < gobalHeight)
                || (level === 'max' && itemHeight > gobalHeight)) {
                gobalHeight = itemHeight;
            }

        });

        $items.height(gobalHeight);

    });

}

jQuery( document ).ready(function($) {
    equalheight('.instagram-block');
});