navigation wp + wp-page nevi

//create a file navigation.php

ni navigation.pho add this code

<?php previous_posts_link( '<span class="meta-nav">&larr;</span> Previous', 0 ); ?>

    <?php next_posts_link( 'Next <span class="meta-nav">&rarr;</span>', 0 ); ?>

//then for add css class to a

//add this code in functions.php

//add nav a css class

add_filter('next_posts_link_attributes', 'posts_link_attributes_1');
add_filter('previous_posts_link_attributes', 'posts_link_attributes_2');

function posts_link_attributes_1() {
    return 'class="next_navigation"';
}
function posts_link_attributes_2() {
    return 'class="previous_navigation"';
}

//change just class name