<?php
if (!defined('TYPO3_MODE')) {
	die ('Access denied.');
}

$tempColumns = array (
    'tx_someextension_somecolumn' => array (
        'exclude' => 0,
        'label' => 'My Link Field',
        'config' => array (
            'type'     => 'input',
            'size'     => '15',
            'max'      => '255',
            'checkbox' => '',
            'eval'     => 'trim',
            'wizards'  => array(
                '_PADDING' => 2,
                'link'     => array(
                    'type'         => 'popup',
                    'title'        => 'Link',
                    'icon'         => 'link_popup.gif',
                    'script'       => 'browse_links.php?mode=wizard',
                    'JSopenParams' => 'height=300,width=500,status=0,menubar=0,scrollbars=1',
		    'params'   => array(
		        'blindLinkOptions' => 'file,mail,folder'
       		    )
                )
            )
        )
    ),
);


t3lib_div::loadTCA('pages');
t3lib_extMgm::addTCAcolumns('pages',$tempColumns,1);
t3lib_extMgm::addToAllTCAtypes('pages','tx_someextension_somecolumn;;;;1-1-1');
t3lib_extMgm::addStaticFile($_EXTKEY, 'Configuration/TypoScript', 'Mobile Counterparts');


?>

<?php
if (!defined('TYPO3_MODE')) {
	die ('Access denied.');
}

$tempColumns = array (
    'tx_someextension_somecolumn' => array (
        'exclude' => 0,
        'label' => 'My Link Field',
        'config' => array (
            'type'     => 'input',
            'size'     => '15',
            'max'      => '255',
            'checkbox' => '',
            'eval'     => 'trim',
            'wizards'  => array(
                '_PADDING' => 2,
                'link'     => array(
                    'type'         => 'popup',
                    'title'        => 'Link',
                    'icon'         => 'link_popup.gif',
                    'script'       => 'browse_links.php?mode=wizard',
                    'JSopenParams' => 'height=300,width=500,status=0,menubar=0,scrollbars=1',
					'params'   => array(
						'blindLinkOptions' => 'file,mail,folder'
					)
                )
            )
        )
    ),
);


t3lib_div::loadTCA('pages');
t3lib_extMgm::addTCAcolumns('pages',$tempColumns,1);
t3lib_extMgm::addToAllTCAtypes('pages','tx_someextension_somecolumn;;;;1-1-1');
t3lib_extMgm::addStaticFile($_EXTKEY, 'Configuration/TypoScript', 'Mobile Counterparts');


?>

<?php
if (!defined('TYPO3_MODE')) {
	die ('Access denied.');
}

$tempColumns = array (
    'tx_someextension_somecolumn' => array (
        'exclude' => 0,
        'label' => 'My Link Field',
        'config' => array (
            'type'     => 'input',
            'size'     => '15',
            'max'      => '255',
            'checkbox' => '',
            'eval'     => 'trim',
            'wizards'  => array(
                '_PADDING' => 2,
                'link'     => array(
                    'type'         => 'popup',
                    'title'        => 'Link',
                    'icon'         => 'link_popup.gif',
                    'script'       => 'browse_links.php?mode=wizard',
                    'JSopenParams' => 'height=300,width=500,status=0,menubar=0,scrollbars=1',
					'params'   => array(
						'blindLinkOptions' => 'file,mail,folder'
					)
                )
            )
        )
    ),
);


t3lib_div::loadTCA('pages');
t3lib_extMgm::addTCAcolumns('pages',$tempColumns,1);
t3lib_extMgm::addToAllTCAtypes('pages','tx_mobilecounterparts_mobile_counterpart;;;;1-1-1');
t3lib_extMgm::addStaticFile($_EXTKEY, 'Configuration/TypoScript', 'Mobile Counterparts');


?>

This example adds a link field to every page's 'Extended' properties tab.

The example shows only the 'Page' and 'External URL' options in the link selection GUI. The contents of blindLinkOptions are the fields that will be hidden in the link wizard. Your options for that list are:

* file 
* mail 
* page
* folder 
* url

Similar to blindLinkOptions, you an set an *allowedExtensions* element in the params array, with a comma-separated list of allowed file extensions. By default, all extensions are allowed.

Allow only certain link types in TYPO3 link wizard

TYPO3